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docker-mailserver/target/scripts/startup/setup-stack.sh

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#! /bin/bash
function setup
{
_notify 'tasklog' 'Configuring mail server'
for FUNC in "${FUNCS_SETUP[@]}"
do
${FUNC}
done
}
function _setup_supervisor
{
if ! grep -q "loglevel = ${SUPERVISOR_LOGLEVEL}" /etc/supervisor/supervisord.conf
then
case "${SUPERVISOR_LOGLEVEL}" in
'critical' | 'error' | 'info' | 'debug' )
sed -i -E \
"s|(loglevel).*|\1 = ${SUPERVISOR_LOGLEVEL}|g" \
/etc/supervisor/supervisord.conf
supervisorctl reload
;;
'warn' )
return 0
;;
* )
_notify 'err' \
"SUPERVISOR_LOGLEVEL '${SUPERVISOR_LOGLEVEL}' unknown. Using default 'warn'"
;;
esac
fi
return 0
}
function _setup_default_vars
{
_notify 'task' 'Setting up default variables'
# update POSTMASTER_ADDRESS - must be done done after _check_hostname
POSTMASTER_ADDRESS="${POSTMASTER_ADDRESS:=postmaster@${DOMAINNAME}}"
# update REPORT_SENDER - must be done done after _check_hostname
REPORT_SENDER="${REPORT_SENDER:=mailserver-report@${HOSTNAME}}"
PFLOGSUMM_SENDER="${PFLOGSUMM_SENDER:=${REPORT_SENDER}}"
# set PFLOGSUMM_TRIGGER here for backwards compatibility
# when REPORT_RECIPIENT is on the old method should be used
# ! needs to be a string comparison
if [[ ${REPORT_RECIPIENT} == '0' ]]
then
PFLOGSUMM_TRIGGER="${PFLOGSUMM_TRIGGER:=none}"
else
PFLOGSUMM_TRIGGER="${PFLOGSUMM_TRIGGER:=logrotate}"
fi
# expand address to simplify the rest of the script
if [[ ${REPORT_RECIPIENT} == '0' ]] || [[ ${REPORT_RECIPIENT} == '1' ]]
then
REPORT_RECIPIENT="${POSTMASTER_ADDRESS}"
fi
PFLOGSUMM_RECIPIENT="${PFLOGSUMM_RECIPIENT:=${REPORT_RECIPIENT}}"
LOGWATCH_RECIPIENT="${LOGWATCH_RECIPIENT:=${REPORT_RECIPIENT}}"
local VAR
for VAR in "${!VARS[@]}"
do
echo "export ${VAR}='${VARS[${VAR}]}'" >>/root/.bashrc
done
{
echo "export PFLOGSUMM_SENDER='${PFLOGSUMM_SENDER}'"
echo "export PFLOGSUMM_TRIGGER='${PFLOGSUMM_TRIGGER}'"
echo "export PFLOGSUMM_RECIPIENT='${PFLOGSUMM_RECIPIENT}'"
echo "export POSTMASTER_ADDRESS='${POSTMASTER_ADDRESS}'"
echo "export REPORT_RECIPIENT='${REPORT_RECIPIENT}'"
echo "export REPORT_SENDER='${REPORT_SENDER}'"
} >>/root/.bashrc
}
# File/folder permissions are fine when using docker volumes, but may be wrong
# when file system folders are mounted into the container.
# Set the expected values and create missing folders/files just in case.
function _setup_file_permissions
{
_notify 'task' 'Setting file/folder permissions'
mkdir -p /var/log/supervisor
mkdir -p /var/log/mail
chown syslog:root /var/log/mail
touch /var/log/mail/clamav.log
chown clamav:adm /var/log/mail/clamav.log
chmod 640 /var/log/mail/clamav.log
touch /var/log/mail/freshclam.log
chown clamav:adm /var/log/mail/freshclam.log
chmod 640 /var/log/mail/freshclam.log
}
function _setup_chksum_file
{
_notify 'task' 'Setting up configuration checksum file'
if [[ -d /tmp/docker-mailserver ]]
then
_notify 'inf' "Creating ${CHKSUM_FILE}"
_monitored_files_checksums >"${CHKSUM_FILE}"
else
# We could just skip the file, but perhaps config can be added later?
# If so it must be processed by the check for changes script
_notify 'inf' "Creating empty ${CHKSUM_FILE} (no config)"
touch "${CHKSUM_FILE}"
fi
}
function _setup_mailname
{
_notify 'task' 'Setting up mailname / creating /etc/mailname'
echo "${DOMAINNAME}" >/etc/mailname
}
function _setup_amavis
{
_notify 'task' 'Setting up Amavis'
sed -i \
"s|^#\$myhostname = \"mail.example.com\";|\$myhostname = \"${HOSTNAME}\";|" \
/etc/amavis/conf.d/05-node_id
}
function _setup_dmarc_hostname
{
_notify 'task' 'Setting up dmarc'
sed -i -e \
"s|^AuthservID.*$|AuthservID '${HOSTNAME}'|g" \
-e "s|^TrustedAuthservIDs.*$|TrustedAuthservIDs '${HOSTNAME}'|g" \
/etc/opendmarc.conf
}
function _setup_postfix_hostname
{
_notify 'task' 'Applying hostname and domainname to Postfix'
postconf -e "myhostname = ${HOSTNAME}"
postconf -e "mydomain = ${DOMAINNAME}"
}
function _setup_dovecot_hostname
{
_notify 'task' 'Applying hostname to Dovecot'
sed -i \
"s|^#hostname =.*$|hostname = '${HOSTNAME}'|g" \
/etc/dovecot/conf.d/15-lda.conf
}
function _setup_dovecot
{
_notify 'task' 'Setting up Dovecot'
# moved from docker file, copy or generate default self-signed cert
if [[ -f /var/mail-state/lib-dovecot/dovecot.pem ]] && [[ ${ONE_DIR} -eq 1 ]]
then
_notify 'inf' "Copying default dovecot cert"
cp /var/mail-state/lib-dovecot/dovecot.key /etc/dovecot/ssl/
cp /var/mail-state/lib-dovecot/dovecot.pem /etc/dovecot/ssl/
fi
if [[ ! -f /etc/dovecot/ssl/dovecot.pem ]]
then
_notify 'inf' 'Generating default Dovecot cert'
/usr/share/dovecot/mkcert.sh
if [[ ${ONE_DIR} -eq 1 ]]
then
mkdir -p /var/mail-state/lib-dovecot
cp /etc/dovecot/ssl/dovecot.key /var/mail-state/lib-dovecot/
cp /etc/dovecot/ssl/dovecot.pem /var/mail-state/lib-dovecot/
fi
fi
cp -a /usr/share/dovecot/protocols.d /etc/dovecot/
# disable pop3 (it will be eventually enabled later in the script, if requested)
mv /etc/dovecot/protocols.d/pop3d.protocol /etc/dovecot/protocols.d/pop3d.protocol.disab
mv /etc/dovecot/protocols.d/managesieved.protocol /etc/dovecot/protocols.d/managesieved.protocol.disab
sed -i -e 's|#ssl = yes|ssl = yes|g' /etc/dovecot/conf.d/10-master.conf
sed -i -e 's|#port = 993|port = 993|g' /etc/dovecot/conf.d/10-master.conf
sed -i -e 's|#port = 995|port = 995|g' /etc/dovecot/conf.d/10-master.conf
sed -i -e 's|#ssl = yes|ssl = required|g' /etc/dovecot/conf.d/10-ssl.conf
sed -i 's|^postmaster_address = .*$|postmaster_address = '"${POSTMASTER_ADDRESS}"'|g' /etc/dovecot/conf.d/15-lda.conf
# set mail_location according to mailbox format
case "${DOVECOT_MAILBOX_FORMAT}" in
"sdbox" | "mdbox" )
_notify 'inf' "Dovecot ${DOVECOT_MAILBOX_FORMAT} format configured"
sed -i -e \
"s|^mail_location = .*$|mail_location = ${DOVECOT_MAILBOX_FORMAT}:\/var\/mail\/%d\/%n|g" \
/etc/dovecot/conf.d/10-mail.conf
_notify 'inf' 'Enabling cron job for dbox purge'
mv /etc/cron.d/dovecot-purge.disabled /etc/cron.d/dovecot-purge
chmod 644 /etc/cron.d/dovecot-purge
;;
* )
_notify 'inf' "Dovecot maildir format configured (default)"
sed -i -e 's|^mail_location = .*$|mail_location = maildir:\/var\/mail\/%d\/%n|g' /etc/dovecot/conf.d/10-mail.conf
;;
esac
# enable Managesieve service by setting the symlink
# to the configuration file Dovecot will actually find
if [[ ${ENABLE_MANAGESIEVE} -eq 1 ]]
then
_notify 'inf' 'Sieve management enabled'
mv /etc/dovecot/protocols.d/managesieved.protocol.disab /etc/dovecot/protocols.d/managesieved.protocol
fi
# copy pipe and filter programs, if any
rm -f /usr/lib/dovecot/sieve-filter/*
rm -f /usr/lib/dovecot/sieve-pipe/*
[[ -d /tmp/docker-mailserver/sieve-filter ]] && cp /tmp/docker-mailserver/sieve-filter/* /usr/lib/dovecot/sieve-filter/
[[ -d /tmp/docker-mailserver/sieve-pipe ]] && cp /tmp/docker-mailserver/sieve-pipe/* /usr/lib/dovecot/sieve-pipe/
# create global sieve directories
mkdir -p /usr/lib/dovecot/sieve-global/before
mkdir -p /usr/lib/dovecot/sieve-global/after
if [[ -f /tmp/docker-mailserver/before.dovecot.sieve ]]
then
cp /tmp/docker-mailserver/before.dovecot.sieve /usr/lib/dovecot/sieve-global/before/50-before.dovecot.sieve
sievec /usr/lib/dovecot/sieve-global/before/50-before.dovecot.sieve
else
rm -f /usr/lib/dovecot/sieve-global/before/50-before.dovecot.sieve /usr/lib/dovecot/sieve-global/before/50-before.dovecot.svbin
fi
if [[ -f /tmp/docker-mailserver/after.dovecot.sieve ]]
then
cp /tmp/docker-mailserver/after.dovecot.sieve /usr/lib/dovecot/sieve-global/after/50-after.dovecot.sieve
sievec /usr/lib/dovecot/sieve-global/after/50-after.dovecot.sieve
else
rm -f /usr/lib/dovecot/sieve-global/after/50-after.dovecot.sieve /usr/lib/dovecot/sieve-global/after/50-after.dovecot.svbin
fi
# sieve will move spams to .Junk folder when SPAMASSASSIN_SPAM_TO_INBOX=1 and MOVE_SPAM_TO_JUNK=1
if [[ ${SPAMASSASSIN_SPAM_TO_INBOX} -eq 1 ]] && [[ ${MOVE_SPAM_TO_JUNK} -eq 1 ]]
then
_notify 'inf' "Spam messages will be moved to the Junk folder."
cp /etc/dovecot/sieve/before/60-spam.sieve /usr/lib/dovecot/sieve-global/before/
sievec /usr/lib/dovecot/sieve-global/before/60-spam.sieve
else
rm -f /usr/lib/dovecot/sieve-global/before/60-spam.sieve /usr/lib/dovecot/sieve-global/before/60-spam.svbin
fi
chown docker:docker -R /usr/lib/dovecot/sieve*
chmod 550 -R /usr/lib/dovecot/sieve*
chmod -f +x /usr/lib/dovecot/sieve-pipe/*
}
function _setup_dovecot_quota
{
_notify 'task' 'Setting up Dovecot quota'
# Dovecot quota is disabled when using LDAP or SMTP_ONLY or when explicitly disabled.
if [[ ${ENABLE_LDAP} -eq 1 ]] || [[ ${SMTP_ONLY} -eq 1 ]] || [[ ${ENABLE_QUOTAS} -eq 0 ]]
then
# disable dovecot quota in docevot confs
if [[ -f /etc/dovecot/conf.d/90-quota.conf ]]
then
mv /etc/dovecot/conf.d/90-quota.conf /etc/dovecot/conf.d/90-quota.conf.disab
sed -i \
"s|mail_plugins = \$mail_plugins quota|mail_plugins = \$mail_plugins|g" \
/etc/dovecot/conf.d/10-mail.conf
sed -i \
"s|mail_plugins = \$mail_plugins imap_quota|mail_plugins = \$mail_plugins|g" \
/etc/dovecot/conf.d/20-imap.conf
fi
# disable quota policy check in postfix
sed -i "s|check_policy_service inet:localhost:65265||g" /etc/postfix/main.cf
else
if [[ -f /etc/dovecot/conf.d/90-quota.conf.disab ]]
then
mv /etc/dovecot/conf.d/90-quota.conf.disab /etc/dovecot/conf.d/90-quota.conf
sed -i \
"s|mail_plugins = \$mail_plugins|mail_plugins = \$mail_plugins quota|g" \
/etc/dovecot/conf.d/10-mail.conf
sed -i \
"s|mail_plugins = \$mail_plugin|mail_plugins = \$mail_plugins imap_quota|g" \
/etc/dovecot/conf.d/20-imap.conf
fi
local MESSAGE_SIZE_LIMIT_MB=$((POSTFIX_MESSAGE_SIZE_LIMIT / 1000000))
local MAILBOX_LIMIT_MB=$((POSTFIX_MAILBOX_SIZE_LIMIT / 1000000))
sed -i \
"s|quota_max_mail_size =.*|quota_max_mail_size = ${MESSAGE_SIZE_LIMIT_MB}$([[ ${MESSAGE_SIZE_LIMIT_MB} -eq 0 ]] && echo "" || echo "M")|g" \
/etc/dovecot/conf.d/90-quota.conf
sed -i \
"s|quota_rule = \*:storage=.*|quota_rule = *:storage=${MAILBOX_LIMIT_MB}$([[ ${MAILBOX_LIMIT_MB} -eq 0 ]] && echo "" || echo "M")|g" \
/etc/dovecot/conf.d/90-quota.conf
if [[ ! -f /tmp/docker-mailserver/dovecot-quotas.cf ]]
then
_notify 'inf' "'config/docker-mailserver/dovecot-quotas.cf' is not provided. Using default quotas."
: >/tmp/docker-mailserver/dovecot-quotas.cf
fi
# enable quota policy check in postfix
sed -i \
"s|reject_unknown_recipient_domain, reject_rbl_client zen.spamhaus.org|reject_unknown_recipient_domain, check_policy_service inet:localhost:65265, reject_rbl_client zen.spamhaus.org|g" \
/etc/postfix/main.cf
fi
}
function _setup_dovecot_local_user
{
_notify 'task' 'Setting up Dovecot Local User'
: >/etc/postfix/vmailbox
: >/etc/dovecot/userdb
if [[ -f /tmp/docker-mailserver/postfix-accounts.cf ]] && [[ ${ENABLE_LDAP} -ne 1 ]]
then
_notify 'inf' "Checking file line endings"
sed -i 's|\r||g' /tmp/docker-mailserver/postfix-accounts.cf
_notify 'inf' "Regenerating postfix user list"
echo "# WARNING: this file is auto-generated. Modify config/postfix-accounts.cf to edit user list." > /etc/postfix/vmailbox
# checking that /tmp/docker-mailserver/postfix-accounts.cf ends with a newline
# shellcheck disable=SC1003
sed -i -e '$a\' /tmp/docker-mailserver/postfix-accounts.cf
chown dovecot:dovecot /etc/dovecot/userdb
chmod 640 /etc/dovecot/userdb
sed -i -e '/\!include auth-ldap\.conf\.ext/s/^/#/' /etc/dovecot/conf.d/10-auth.conf
sed -i -e '/\!include auth-passwdfile\.inc/s/^#//' /etc/dovecot/conf.d/10-auth.conf
# creating users ; 'pass' is encrypted
# comments and empty lines are ignored
while IFS=$'|' read -r LOGIN PASS USER_ATTRIBUTES
do
# Setting variables for better readability
USER=$(echo "${LOGIN}" | cut -d @ -f1)
DOMAIN=$(echo "${LOGIN}" | cut -d @ -f2)
# test if user has a defined quota
if [[ -f /tmp/docker-mailserver/dovecot-quotas.cf ]]
then
declare -a USER_QUOTA
IFS=':' ; read -r -a USER_QUOTA < <(grep "${USER}@${DOMAIN}:" -i /tmp/docker-mailserver/dovecot-quotas.cf)
unset IFS
[[ ${#USER_QUOTA[@]} -eq 2 ]] && USER_ATTRIBUTES="${USER_ATTRIBUTES} userdb_quota_rule=*:bytes=${USER_QUOTA[1]}"
fi
# Let's go!
_notify 'inf' "user '${USER}' for domain '${DOMAIN}' with password '********', attr=${USER_ATTRIBUTES}"
echo "${LOGIN} ${DOMAIN}/${USER}/" >> /etc/postfix/vmailbox
# User database for dovecot has the following format:
# user:password:uid:gid:(gecos):home:(shell):extra_fields
# Example :
# ${LOGIN}:${PASS}:5000:5000::/var/mail/${DOMAIN}/${USER}::userdb_mail=maildir:/var/mail/${DOMAIN}/${USER}
echo "${LOGIN}:${PASS}:5000:5000::/var/mail/${DOMAIN}/${USER}::${USER_ATTRIBUTES}" >> /etc/dovecot/userdb
mkdir -p "/var/mail/${DOMAIN}/${USER}"
# Copy user provided sieve file, if present
if [[ -e "/tmp/docker-mailserver/${LOGIN}.dovecot.sieve" ]]
then
cp "/tmp/docker-mailserver/${LOGIN}.dovecot.sieve" "/var/mail/${DOMAIN}/${USER}/.dovecot.sieve"
fi
echo "${DOMAIN}" >> /tmp/vhost.tmp
done < <(grep -v "^\s*$\|^\s*\#" /tmp/docker-mailserver/postfix-accounts.cf)
else
_notify 'inf' "'config/docker-mailserver/postfix-accounts.cf' is not provided. No mail account created."
fi
if ! grep '@' /tmp/docker-mailserver/postfix-accounts.cf 2>/dev/null | grep -q '|'
then
if [[ ${ENABLE_LDAP} -eq 0 ]]
then
_notify 'fatal' 'Unless using LDAP, you need at least 1 email account to start Dovecot.'
_defunc
fi
fi
}
function _setup_ldap
{
_notify 'task' 'Setting up Ldap'
_notify 'inf' 'Checking for custom configs'
for i in 'users' 'groups' 'aliases' 'domains'
do
local FPATH="/tmp/docker-mailserver/ldap-${i}.cf"
if [[ -f ${FPATH} ]]
then
cp "${FPATH}" "/etc/postfix/ldap-${i}.cf"
fi
done
_notify 'inf' 'Starting to override configs'
local FILES=(
/etc/postfix/ldap-users.cf
/etc/postfix/ldap-groups.cf
/etc/postfix/ldap-aliases.cf
/etc/postfix/ldap-domains.cf
/etc/postfix/maps/sender_login_maps.ldap
)
for FILE in "${FILES[@]}"
do
[[ ${FILE} =~ ldap-user ]] && export LDAP_QUERY_FILTER="${LDAP_QUERY_FILTER_USER}"
[[ ${FILE} =~ ldap-group ]] && export LDAP_QUERY_FILTER="${LDAP_QUERY_FILTER_GROUP}"
[[ ${FILE} =~ ldap-aliases ]] && export LDAP_QUERY_FILTER="${LDAP_QUERY_FILTER_ALIAS}"
[[ ${FILE} =~ ldap-domains ]] && export LDAP_QUERY_FILTER="${LDAP_QUERY_FILTER_DOMAIN}"
configomat.sh "LDAP_" "${FILE}"
done
_notify 'inf' "Configuring dovecot LDAP"
declare -A _dovecot_ldap_mapping
_dovecot_ldap_mapping["DOVECOT_BASE"]="${DOVECOT_BASE:="${LDAP_SEARCH_BASE}"}"
_dovecot_ldap_mapping["DOVECOT_DN"]="${DOVECOT_DN:="${LDAP_BIND_DN}"}"
_dovecot_ldap_mapping["DOVECOT_DNPASS"]="${DOVECOT_DNPASS:="${LDAP_BIND_PW}"}"
_dovecot_ldap_mapping["DOVECOT_HOSTS"]="${DOVECOT_HOSTS:="${LDAP_SERVER_HOST}"}"
# Not sure whether this can be the same or not
# _dovecot_ldap_mapping["DOVECOT_PASS_FILTER"]="${DOVECOT_PASS_FILTER:="${LDAP_QUERY_FILTER_USER}"}"
# _dovecot_ldap_mapping["DOVECOT_USER_FILTER"]="${DOVECOT_USER_FILTER:="${LDAP_QUERY_FILTER_USER}"}"
for VAR in "${!_dovecot_ldap_mapping[@]}"
do
export "${VAR}=${_dovecot_ldap_mapping[${VAR}]}"
done
configomat.sh "DOVECOT_" "/etc/dovecot/dovecot-ldap.conf.ext"
# add domainname to vhost
echo "${DOMAINNAME}" >>/tmp/vhost.tmp
_notify 'inf' "Enabling dovecot LDAP authentification"
sed -i -e '/\!include auth-ldap\.conf\.ext/s/^#//' /etc/dovecot/conf.d/10-auth.conf
sed -i -e '/\!include auth-passwdfile\.inc/s/^/#/' /etc/dovecot/conf.d/10-auth.conf
_notify 'inf' "Configuring LDAP"
if [[ -f /etc/postfix/ldap-users.cf ]]
then
postconf -e "virtual_mailbox_maps = ldap:/etc/postfix/ldap-users.cf" || \
_notify 'inf' "==> Warning: /etc/postfix/ldap-user.cf not found"
fi
if [[ -f /etc/postfix/ldap-domains.cf ]]
then
postconf -e "virtual_mailbox_domains = /etc/postfix/vhost, ldap:/etc/postfix/ldap-domains.cf" || \
_notify 'inf' "==> Warning: /etc/postfix/ldap-domains.cf not found"
fi
if [[ -f /etc/postfix/ldap-aliases.cf ]] && [[ -f /etc/postfix/ldap-groups.cf ]]
then
postconf -e "virtual_alias_maps = ldap:/etc/postfix/ldap-aliases.cf, ldap:/etc/postfix/ldap-groups.cf" || \
_notify 'inf' "==> Warning: /etc/postfix/ldap-aliases.cf or /etc/postfix/ldap-groups.cf not found"
fi
# shellcheck disable=SC2016
sed -i 's|mydestination = \$myhostname, |mydestination = |' /etc/postfix/main.cf
return 0
}
function _setup_postgrey
{
_notify 'inf' "Configuring postgrey"
sed -i -E \
's|, reject_rbl_client zen.spamhaus.org$|, reject_rbl_client zen.spamhaus.org, check_policy_service inet:127.0.0.1:10023|' \
/etc/postfix/main.cf
sed -i -e \
"s|\"--inet=127.0.0.1:10023\"|\"--inet=127.0.0.1:10023 --delay=${POSTGREY_DELAY} --max-age=${POSTGREY_MAX_AGE} --auto-whitelist-clients=${POSTGREY_AUTO_WHITELIST_CLIENTS}\"|" \
/etc/default/postgrey
TEXT_FOUND=$(grep -c -i "POSTGREY_TEXT" /etc/default/postgrey)
if [[ ${TEXT_FOUND} -eq 0 ]]
then
printf "POSTGREY_TEXT=\"%s\"\n\n" "${POSTGREY_TEXT}" >>/etc/default/postgrey
fi
if [[ -f /tmp/docker-mailserver/whitelist_clients.local ]]
then
cp -f /tmp/docker-mailserver/whitelist_clients.local /etc/postgrey/whitelist_clients.local
fi
if [[ -f /tmp/docker-mailserver/whitelist_recipients ]]
then
cp -f /tmp/docker-mailserver/whitelist_recipients /etc/postgrey/whitelist_recipients
fi
}
function _setup_postfix_postscreen
{
_notify 'inf' "Configuring postscreen"
sed -i \
-e "s|postscreen_dnsbl_action = enforce|postscreen_dnsbl_action = ${POSTSCREEN_ACTION}|" \
-e "s|postscreen_greet_action = enforce|postscreen_greet_action = ${POSTSCREEN_ACTION}|" \
-e "s|postscreen_bare_newline_action = enforce|postscreen_bare_newline_action = ${POSTSCREEN_ACTION}|" /etc/postfix/main.cf
}
function _setup_postfix_sizelimits
{
_notify 'inf' "Configuring postfix message size limit"
postconf -e "message_size_limit = ${POSTFIX_MESSAGE_SIZE_LIMIT}"
_notify 'inf' "Configuring postfix mailbox size limit"
postconf -e "mailbox_size_limit = ${POSTFIX_MAILBOX_SIZE_LIMIT}"
_notify 'inf' "Configuring postfix virtual mailbox size limit"
postconf -e "virtual_mailbox_limit = ${POSTFIX_MAILBOX_SIZE_LIMIT}"
}
function _setup_postfix_smtputf8
{
_notify 'inf' "Configuring postfix smtputf8 support (disable)"
postconf -e "smtputf8_enable = no"
}
function _setup_spoof_protection
{
_notify 'inf' "Configuring Spoof Protection"
sed -i \
's|smtpd_sender_restrictions =|smtpd_sender_restrictions = reject_authenticated_sender_login_mismatch,|' \
/etc/postfix/main.cf
if [[ ${ENABLE_LDAP} -eq 1 ]]
then
postconf -e "smtpd_sender_login_maps = ldap:/etc/postfix/ldap-users.cf ldap:/etc/postfix/ldap-aliases.cf ldap:/etc/postfix/ldap-groups.cf"
else
if [[ -f /etc/postfix/regexp ]]
then
postconf -e "smtpd_sender_login_maps = unionmap:{ texthash:/etc/postfix/virtual, hash:/etc/aliases, pcre:/etc/postfix/maps/sender_login_maps.pcre, pcre:/etc/postfix/regexp }"
else
postconf -e "smtpd_sender_login_maps = texthash:/etc/postfix/virtual, hash:/etc/aliases, pcre:/etc/postfix/maps/sender_login_maps.pcre"
fi
fi
}
function _setup_postfix_access_control
{
_notify 'inf' 'Configuring user access'
if [[ -f /tmp/docker-mailserver/postfix-send-access.cf ]]
then
sed -i 's|smtpd_sender_restrictions =|smtpd_sender_restrictions = check_sender_access texthash:/tmp/docker-mailserver/postfix-send-access.cf,|' /etc/postfix/main.cf
fi
if [[ -f /tmp/docker-mailserver/postfix-receive-access.cf ]]
then
sed -i 's|smtpd_recipient_restrictions =|smtpd_recipient_restrictions = check_recipient_access texthash:/tmp/docker-mailserver/postfix-receive-access.cf,|' /etc/postfix/main.cf
fi
}
function _setup_postfix_sasl
{
if [[ ${ENABLE_SASLAUTHD} -eq 1 ]] && [[ ! -f /etc/postfix/sasl/smtpd.conf ]]
then
cat >/etc/postfix/sasl/smtpd.conf << EOF
pwcheck_method: saslauthd
mech_list: plain login
EOF
fi
if [[ ${ENABLE_SASLAUTHD} -eq 0 ]] && [[ ${SMTP_ONLY} -eq 1 ]]
then
sed -i -E \
's|^smtpd_sasl_auth_enable =.*|smtpd_sasl_auth_enable = no|g' \
/etc/postfix/main.cf
sed -i -E \
's|^ -o smtpd_sasl_auth_enable=.*| -o smtpd_sasl_auth_enable=no|g' \
/etc/postfix/master.cf
fi
}
function _setup_saslauthd
{
_notify 'task' "Setting up SASLAUTHD"
# checking env vars and setting defaults
[[ -z ${SASLAUTHD_MECHANISMS:-} ]] && SASLAUTHD_MECHANISMS=pam
[[ ${SASLAUTHD_MECHANISMS:-} == ldap ]] && [[ -z ${SASLAUTHD_LDAP_SEARCH_BASE} ]] && SASLAUTHD_MECHANISMS=pam
[[ -z ${SASLAUTHD_LDAP_SERVER} ]] && SASLAUTHD_LDAP_SERVER=localhost
[[ -z ${SASLAUTHD_LDAP_FILTER} ]] && SASLAUTHD_LDAP_FILTER='(&(uniqueIdentifier=%u)(mailEnabled=TRUE))'
if [[ -z ${SASLAUTHD_LDAP_SSL} ]] || [[ ${SASLAUTHD_LDAP_SSL} -eq 0 ]]
then
SASLAUTHD_LDAP_PROTO='ldap://' || SASLAUTHD_LDAP_PROTO='ldaps://'
fi
[[ -z ${SASLAUTHD_LDAP_START_TLS} ]] && SASLAUTHD_LDAP_START_TLS=no
[[ -z ${SASLAUTHD_LDAP_TLS_CHECK_PEER} ]] && SASLAUTHD_LDAP_TLS_CHECK_PEER=no
[[ -z ${SASLAUTHD_LDAP_AUTH_METHOD} ]] && SASLAUTHD_LDAP_AUTH_METHOD=bind
if [[ -z ${SASLAUTHD_LDAP_TLS_CACERT_FILE} ]]
then
SASLAUTHD_LDAP_TLS_CACERT_FILE=""
else
SASLAUTHD_LDAP_TLS_CACERT_FILE="ldap_tls_cacert_file: ${SASLAUTHD_LDAP_TLS_CACERT_FILE}"
fi
if [[ -z ${SASLAUTHD_LDAP_TLS_CACERT_DIR} ]]
then
SASLAUTHD_LDAP_TLS_CACERT_DIR=""
else
SASLAUTHD_LDAP_TLS_CACERT_DIR="ldap_tls_cacert_dir: ${SASLAUTHD_LDAP_TLS_CACERT_DIR}"
fi
if [[ -z ${SASLAUTHD_LDAP_PASSWORD_ATTR} ]]
then
SASLAUTHD_LDAP_PASSWORD_ATTR=""
else
SASLAUTHD_LDAP_PASSWORD_ATTR="ldap_password_attr: ${SASLAUTHD_LDAP_PASSWORD_ATTR}"
fi
if [[ -z ${SASLAUTHD_LDAP_MECH} ]]
then
SASLAUTHD_LDAP_MECH=""
else
SASLAUTHD_LDAP_MECH="ldap_mech: ${SASLAUTHD_LDAP_MECH}"
fi
if [[ ! -f /etc/saslauthd.conf ]]
then
_notify 'inf' 'Creating /etc/saslauthd.conf'
cat > /etc/saslauthd.conf << EOF
ldap_servers: ${SASLAUTHD_LDAP_PROTO}${SASLAUTHD_LDAP_SERVER}
ldap_auth_method: ${SASLAUTHD_LDAP_AUTH_METHOD}
ldap_bind_dn: ${SASLAUTHD_LDAP_BIND_DN}
ldap_bind_pw: ${SASLAUTHD_LDAP_PASSWORD}
ldap_search_base: ${SASLAUTHD_LDAP_SEARCH_BASE}
ldap_filter: ${SASLAUTHD_LDAP_FILTER}
ldap_start_tls: ${SASLAUTHD_LDAP_START_TLS}
ldap_tls_check_peer: ${SASLAUTHD_LDAP_TLS_CHECK_PEER}
${SASLAUTHD_LDAP_TLS_CACERT_FILE}
${SASLAUTHD_LDAP_TLS_CACERT_DIR}
${SASLAUTHD_LDAP_PASSWORD_ATTR}
${SASLAUTHD_LDAP_MECH}
ldap_referrals: yes
log_level: 10
EOF
fi
sed -i \
-e "/^[^#].*smtpd_sasl_type.*/s/^/#/g" \
-e "/^[^#].*smtpd_sasl_path.*/s/^/#/g" \
/etc/postfix/master.cf
sed -i \
-e "/smtpd_sasl_path =.*/d" \
-e "/smtpd_sasl_type =.*/d" \
-e "/dovecot_destination_recipient_limit =.*/d" \
/etc/postfix/main.cf
gpasswd -a postfix sasl
}
function _setup_postfix_aliases
{
_notify 'task' 'Setting up Postfix Aliases'
: >/etc/postfix/virtual
: >/etc/postfix/regexp
if [[ -f /tmp/docker-mailserver/postfix-virtual.cf ]]
then
# fixing old virtual user file
if grep -q ",$" /tmp/docker-mailserver/postfix-virtual.cf
then
sed -i -e "s|, |,|g" -e "s|,$||g" /tmp/docker-mailserver/postfix-virtual.cf
fi
cp -f /tmp/docker-mailserver/postfix-virtual.cf /etc/postfix/virtual
# the `to` is important, don't delete it
# shellcheck disable=SC2034
while read -r FROM TO
do
UNAME=$(echo "${FROM}" | cut -d @ -f1)
DOMAIN=$(echo "${FROM}" | cut -d @ -f2)
# if they are equal it means the line looks like: "user1 other@domain.tld"
[[ ${UNAME} != "${DOMAIN}" ]] && echo "${DOMAIN}" >>/tmp/vhost.tmp
done < <(grep -v "^\s*$\|^\s*\#" /tmp/docker-mailserver/postfix-virtual.cf || true)
else
_notify 'inf' "Warning 'config/postfix-virtual.cf' is not provided. No mail alias/forward created."
fi
if [[ -f /tmp/docker-mailserver/postfix-regexp.cf ]]
then
_notify 'inf' "Adding regexp alias file postfix-regexp.cf"
cp -f /tmp/docker-mailserver/postfix-regexp.cf /etc/postfix/regexp
sed -i -E \
's|virtual_alias_maps(.*)|virtual_alias_maps\1 pcre:/etc/postfix/regexp|g' \
/etc/postfix/main.cf
fi
_notify 'inf' 'Configuring root alias'
echo "root: ${POSTMASTER_ADDRESS}" > /etc/aliases
if [[ -f /tmp/docker-mailserver/postfix-aliases.cf ]]
then
cat /tmp/docker-mailserver/postfix-aliases.cf >>/etc/aliases
else
_notify 'inf' "'config/postfix-aliases.cf' is not provided and will be auto created."
: >/tmp/docker-mailserver/postfix-aliases.cf
fi
postalias /etc/aliases
}
function _setup_SRS
{
_notify 'task' 'Setting up SRS'
postconf -e "sender_canonical_maps = tcp:localhost:10001"
postconf -e "sender_canonical_classes = ${SRS_SENDER_CLASSES}"
postconf -e "recipient_canonical_maps = tcp:localhost:10002"
postconf -e "recipient_canonical_classes = envelope_recipient,header_recipient"
}
function _setup_dkim
{
_notify 'task' 'Setting up DKIM'
mkdir -p /etc/opendkim && touch /etc/opendkim/SigningTable
# check if any keys are available
if [[ -e "/tmp/docker-mailserver/opendkim/KeyTable" ]]
then
cp -a /tmp/docker-mailserver/opendkim/* /etc/opendkim/
_notify 'inf' "DKIM keys added for: $(ls -C /etc/opendkim/keys/)"
_notify 'inf' "Changing permissions on /etc/opendkim"
chown -R opendkim:opendkim /etc/opendkim/
chmod -R 0700 /etc/opendkim/keys/
else
_notify 'warn' 'No DKIM key provided. Check the documentation on how to get your keys.'
[[ ! -f "/etc/opendkim/KeyTable" ]] && touch "/etc/opendkim/KeyTable"
fi
# setup nameservers paramater from /etc/resolv.conf if not defined
if ! grep '^Nameservers' /etc/opendkim.conf
then
echo "Nameservers $(grep '^nameserver' /etc/resolv.conf | awk -F " " '{print $2}' | paste -sd ',' -)" >> /etc/opendkim.conf
_notify 'inf' "Nameservers added to /etc/opendkim.conf"
fi
}
function _setup_ssl
{
_notify 'task' 'Setting up SSL'
local POSTFIX_CONFIG_MAIN='/etc/postfix/main.cf'
local DOVECOT_CONFIG_SSL='/etc/dovecot/conf.d/10-ssl.conf'
# Primary certificate to serve for TLS
function _set_certificate
{
local POSTFIX_KEY_WITH_FULLCHAIN=$1
local DOVECOT_KEY=$1
local DOVECOT_CERT=$1
# If 2nd param is provided, we've been provided separate key and cert instead of a fullkeychain
if [[ -n $2 ]]
then
local PRIVATE_KEY=$1
local CERT_CHAIN=$2
POSTFIX_KEY_WITH_FULLCHAIN="${PRIVATE_KEY} ${CERT_CHAIN}"
DOVECOT_KEY="${PRIVATE_KEY}"
DOVECOT_CERT="${CERT_CHAIN}"
fi
# Postfix configuration
# NOTE: `smtpd_tls_chain_files` expects private key defined before public cert chain
# May be a single PEM file or a sequence of files, so long as the order is key->leaf->chain
sed -i "s|^smtpd_tls_chain_files =.*|smtpd_tls_chain_files = ${POSTFIX_KEY_WITH_FULLCHAIN}|" "${POSTFIX_CONFIG_MAIN}"
# Dovecot configuration
sed -i "s|^ssl_key = <.*|ssl_key = <${DOVECOT_KEY}|" "${DOVECOT_CONFIG_SSL}"
sed -i "s|^ssl_cert = <.*|ssl_cert = <${DOVECOT_CERT}|" "${DOVECOT_CONFIG_SSL}"
}
# Enables supporting two certificate types such as ECDSA with an RSA fallback
function _set_alt_certificate
{
local COPY_KEY_FROM_PATH=$1
local COPY_CERT_FROM_PATH=$2
local PRIVATE_KEY_ALT='/etc/postfix/ssl/fallback_key'
local CERT_CHAIN_ALT='/etc/postfix/ssl/fallback_cert'
cp "${COPY_KEY_FROM_PATH}" "${PRIVATE_KEY_ALT}"
cp "${COPY_CERT_FROM_PATH}" "${CERT_CHAIN_ALT}"
chmod 600 "${PRIVATE_KEY_ALT}"
chmod 600 "${CERT_CHAIN_ALT}"
# Postfix configuration
# NOTE: This operation doesn't replace the line, it appends to the end of the line.
# Thus this method should only be used when this line has explicitly been replaced earlier in the script.
# Otherwise without `docker-compose down` first, a `docker-compose up` may
# persist previous container state and cause a failure in postfix configuration.
sed -i "s|^smtpd_tls_chain_files =.*|& ${PRIVATE_KEY_ALT} ${CERT_CHAIN_ALT}|" "${POSTFIX_CONFIG_MAIN}"
# Dovecot configuration
# Conditionally checks for `#`, in the event that internal container state is accidentally persisted,
# can be caused by: `docker-compose up` run again after a `ctrl+c`, without running `docker-compose down`
sed -i "s|^#\?ssl_alt_key = <.*|ssl_alt_key = <${PRIVATE_KEY_ALT}|" "${DOVECOT_CONFIG_SSL}"
sed -i "s|^#\?ssl_alt_cert = <.*|ssl_alt_cert = <${CERT_CHAIN_ALT}|" "${DOVECOT_CONFIG_SSL}"
}
function _apply_tls_level
{
local TLS_CIPHERS_ALLOW=$1
local TLS_PROTOCOL_IGNORE=$2
local TLS_PROTOCOL_MINIMUM=$3
# Postfix configuration
sed -i "s|^smtpd_tls_mandatory_protocols =.*|smtpd_tls_mandatory_protocols = ${TLS_PROTOCOL_IGNORE}|" "${POSTFIX_CONFIG_MAIN}"
sed -i "s|^smtpd_tls_protocols =.*|smtpd_tls_protocols = ${TLS_PROTOCOL_IGNORE}|" "${POSTFIX_CONFIG_MAIN}"
sed -i "s|^smtp_tls_protocols =.*|smtp_tls_protocols = ${TLS_PROTOCOL_IGNORE}|" "${POSTFIX_CONFIG_MAIN}"
sed -i "s|^tls_high_cipherlist =.*|tls_high_cipherlist = ${TLS_CIPHERS_ALLOW}|" "${POSTFIX_CONFIG_MAIN}"
# Dovecot configuration (secure by default though)
sed -i "s|^ssl_min_protocol =.*|ssl_min_protocol = ${TLS_PROTOCOL_MINIMUM}|" "${DOVECOT_CONFIG_SSL}"
sed -i "s|^ssl_cipher_list =.*|ssl_cipher_list = ${TLS_CIPHERS_ALLOW}|" "${DOVECOT_CONFIG_SSL}"
}
# TLS strength/level configuration
case "${TLS_LEVEL}" in
"modern" )
local TLS_MODERN_SUITE='ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384'
local TLS_MODERN_IGNORE='!SSLv2,!SSLv3,!TLSv1,!TLSv1.1'
local TLS_MODERN_MIN='TLSv1.2'
_apply_tls_level "${TLS_MODERN_SUITE}" "${TLS_MODERN_IGNORE}" "${TLS_MODERN_MIN}"
_notify 'inf' "TLS configured with 'modern' ciphers"
;;
"intermediate" )
local TLS_INTERMEDIATE_SUITE='ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA'
local TLS_INTERMEDIATE_IGNORE='!SSLv2,!SSLv3'
local TLS_INTERMEDIATE_MIN='TLSv1'
_apply_tls_level "${TLS_INTERMEDIATE_SUITE}" "${TLS_INTERMEDIATE_IGNORE}" "${TLS_INTERMEDIATE_MIN}"
_notify 'inf' "TLS configured with 'intermediate' ciphers"
;;
* )
_notify 'err' 'TLS_LEVEL not found [ in _setup_ssl ]'
;;
esac
# SSL certificate Configuration
# TODO: Refactor this feature, it's been extended multiple times for specific inputs/providers unnecessarily.
# NOTE: Some `SSL_TYPE` logic uses mounted certs/keys directly, some make an internal copy either retaining filename or renaming, chmod inconsistent.
case "${SSL_TYPE}" in
"letsencrypt" )
_notify 'inf' "Configuring SSL using 'letsencrypt'"
# letsencrypt folders and files mounted in /etc/letsencrypt
local LETSENCRYPT_DOMAIN=""
local LETSENCRYPT_KEY=""
# 2020 feature intended for Traefik v2 support only:
# https://github.com/docker-mailserver/docker-mailserver/pull/1553
# Uses `key.pem` and `fullchain.pem`
if [[ -f /etc/letsencrypt/acme.json ]]
then
if ! _extract_certs_from_acme "${SSL_DOMAIN}"
then
if ! _extract_certs_from_acme "${HOSTNAME}"
then
_extract_certs_from_acme "${DOMAINNAME}"
fi
fi
fi
# first determine the letsencrypt domain by checking both the full hostname or just the domainname if a SAN is used in the cert
if [[ -e /etc/letsencrypt/live/${HOSTNAME}/fullchain.pem ]]
then
LETSENCRYPT_DOMAIN=${HOSTNAME}
elif [[ -e /etc/letsencrypt/live/${DOMAINNAME}/fullchain.pem ]]
then
LETSENCRYPT_DOMAIN=${DOMAINNAME}
else
_notify 'err' "Cannot access '/etc/letsencrypt/live/${HOSTNAME}/fullchain.pem' or '/etc/letsencrypt/live/${DOMAINNAME}/fullchain.pem'"
return 1
fi
# then determine the keyfile to use
if [[ -n ${LETSENCRYPT_DOMAIN} ]]
then
if [[ -e /etc/letsencrypt/live/${LETSENCRYPT_DOMAIN}/privkey.pem ]]
then
LETSENCRYPT_KEY="privkey"
elif [[ -e /etc/letsencrypt/live/${LETSENCRYPT_DOMAIN}/key.pem ]]
then
LETSENCRYPT_KEY="key"
else
_notify 'err' "Cannot access '/etc/letsencrypt/live/${LETSENCRYPT_DOMAIN}/privkey.pem' nor 'key.pem'"
return 1
fi
fi
# finally, make the changes to the postfix and dovecot configurations
if [[ -n ${LETSENCRYPT_KEY} ]]
then
_notify 'inf' "Adding ${LETSENCRYPT_DOMAIN} SSL certificate to the postfix and dovecot configuration"
# LetsEncrypt `fullchain.pem` and `privkey.pem` contents are detailed here from CertBot:
# https://certbot.eff.org/docs/using.html#where-are-my-certificates
# `key.pem` was added for `simp_le` support (2016): https://github.com/docker-mailserver/docker-mailserver/pull/288
# `key.pem` is also a filename used by the `_extract_certs_from_acme` method (implemented for Traefik v2 only)
local PRIVATE_KEY="/etc/letsencrypt/live/${LETSENCRYPT_DOMAIN}/${LETSENCRYPT_KEY}.pem"
local CERT_CHAIN="/etc/letsencrypt/live/${LETSENCRYPT_DOMAIN}/fullchain.pem"
_set_certificate "${PRIVATE_KEY}" "${CERT_CHAIN}"
_notify 'inf' "SSL configured with 'letsencrypt' certificates"
fi
return 0
;;
"custom" )
# Adding CA signed SSL certificate if provided in 'postfix/ssl' folder
if [[ -e /tmp/docker-mailserver/ssl/${HOSTNAME}-full.pem ]]
then
_notify 'inf' "Adding ${HOSTNAME} SSL certificate"
mkdir -p /etc/postfix/ssl
cp "/tmp/docker-mailserver/ssl/${HOSTNAME}-full.pem" /etc/postfix/ssl
# Private key with full certificate chain all in a single PEM file
# NOTE: Dovecot works fine still as both values are bundled into the keychain
local KEY_WITH_FULLCHAIN='/etc/postfix/ssl/'"${HOSTNAME}"'-full.pem'
_set_certificate "${KEY_WITH_FULLCHAIN}"
_notify 'inf' "SSL configured with 'CA signed/custom' certificates"
fi
;;
"manual" )
# Lets you manually specify the location of the SSL Certs to use. This gives you some more control over this whole processes (like using kube-lego to generate certs)
if [[ -n ${SSL_CERT_PATH} ]] && [[ -n ${SSL_KEY_PATH} ]]
then
_notify 'inf' "Configuring certificates using cert ${SSL_CERT_PATH} and key ${SSL_KEY_PATH}"
mkdir -p /etc/postfix/ssl
cp "${SSL_KEY_PATH}" /etc/postfix/ssl/key
cp "${SSL_CERT_PATH}" /etc/postfix/ssl/cert
chmod 600 /etc/postfix/ssl/key
chmod 600 /etc/postfix/ssl/cert
local PRIVATE_KEY='/etc/postfix/ssl/key'
local CERT_CHAIN='/etc/postfix/ssl/cert'
_set_certificate "${PRIVATE_KEY}" "${CERT_CHAIN}"
# Support for a fallback certificate, useful for hybrid/dual ECDSA + RSA certs
if [[ -n ${SSL_ALT_KEY_PATH} ]] && [[ -n ${SSL_ALT_CERT_PATH} ]]
then
_notify 'inf' "Configuring alternative certificates using cert ${SSL_ALT_CERT_PATH} and key ${SSL_ALT_KEY_PATH}"
_set_alt_certificate "${SSL_ALT_KEY_PATH}" "${SSL_ALT_CERT_PATH}"
else
# If the Dovecot settings for alt cert has been enabled (doesn't start with `#`),
# but required ENV var is missing, reset to disabled state:
sed -i 's|^ssl_alt_key = <.*|#ssl_alt_key = </path/to/alternative/key.pem|' "${DOVECOT_CONFIG_SSL}"
sed -i 's|^ssl_alt_cert = <.*|#ssl_alt_cert = </path/to/alternative/cert.pem|' "${DOVECOT_CONFIG_SSL}"
fi
_notify 'inf' "SSL configured with 'Manual' certificates"
fi
;;
"self-signed" )
# Adding self-signed SSL certificate if provided in 'postfix/ssl' folder
if [[ -e /tmp/docker-mailserver/ssl/${HOSTNAME}-key.pem ]] \
&& [[ -e /tmp/docker-mailserver/ssl/${HOSTNAME}-cert.pem ]] \
&& [[ -e /tmp/docker-mailserver/ssl/demoCA/cacert.pem ]]
then
_notify 'inf' "Adding ${HOSTNAME} SSL certificate"
mkdir -p /etc/postfix/ssl
cp "/tmp/docker-mailserver/ssl/${HOSTNAME}-key.pem" /etc/postfix/ssl
cp "/tmp/docker-mailserver/ssl/${HOSTNAME}-cert.pem" /etc/postfix/ssl
chmod 600 "/etc/postfix/ssl/${HOSTNAME}-key.pem"
local PRIVATE_KEY="/etc/postfix/ssl/${HOSTNAME}-key.pem"
local CERT_CHAIN="/etc/postfix/ssl/${HOSTNAME}-cert.pem"
_set_certificate "${PRIVATE_KEY}" "${CERT_CHAIN}"
cp /tmp/docker-mailserver/ssl/demoCA/cacert.pem /etc/postfix/ssl
# Have Postfix trust the self-signed CA (which is not installed within the OS trust store)
sed -i -r 's|^#?smtpd_tls_CAfile =.*|smtpd_tls_CAfile = /etc/postfix/ssl/cacert.pem|' "${POSTFIX_CONFIG_MAIN}"
sed -i -r 's|^#?smtp_tls_CAfile =.*|smtp_tls_CAfile = /etc/postfix/ssl/cacert.pem|' "${POSTFIX_CONFIG_MAIN}"
# Part of the original `self-signed` support, unclear why this symlink was required?
# May have been to support the now removed `Courier` (Dovecot replaced it):
# https://github.com/docker-mailserver/docker-mailserver/commit/1fb3aeede8ac9707cc9ea11d603e3a7b33b5f8d5
local PRIVATE_CA="/etc/ssl/certs/cacert-${HOSTNAME}.pem"
ln -s /etc/postfix/ssl/cacert.pem "${PRIVATE_CA}"
_notify 'inf' "SSL configured with 'self-signed' certificates"
fi
;;
'' )
# no SSL certificate, plain text access
# TODO: Postfix configuration still responds to TLS negotiations using snakeoil cert from default config
# TODO: Dovecot `ssl = yes` also allows TLS, both cases this is insecure and should probably instead enforce no TLS?
# Dovecot configuration
# WARNING: This may not be corrected(reset?) if `SSL_TYPE` is changed and internal config state persisted
sed -i -e 's|^#disable_plaintext_auth = yes|disable_plaintext_auth = no|g' /etc/dovecot/conf.d/10-auth.conf
sed -i -e 's|^ssl = required|ssl = yes|g' "${DOVECOT_CONFIG_SSL}"
_notify 'warn' "(INSECURE!) SSL configured with plain text access. DO NOT USE FOR PRODUCTION DEPLOYMENT."
;;
* )
# Unknown option, default behavior, no action is required
_notify 'warn' "(INSECURE!) ENV var 'SSL_TYPE' is invalid. DO NOT USE FOR PRODUCTION DEPLOYMENT."
;;
esac
}
function _setup_postfix_vhost
{
_notify 'task' "Setting up Postfix vhost"
if [[ -f /tmp/vhost.tmp ]]
then
sort < /tmp/vhost.tmp | uniq > /etc/postfix/vhost
rm /tmp/vhost.tmp
elif [[ ! -f /etc/postfix/vhost ]]
then
touch /etc/postfix/vhost
fi
}
function _setup_inet_protocols
{
_notify 'task' 'Setting up POSTFIX_INET_PROTOCOLS option'
postconf -e "inet_protocols = ${POSTFIX_INET_PROTOCOLS}"
}
function _setup_docker_permit
{
_notify 'task' 'Setting up PERMIT_DOCKER Option'
local CONTAINER_IP CONTAINER_NETWORK
unset CONTAINER_NETWORKS
declare -a CONTAINER_NETWORKS
CONTAINER_IP=$(ip addr show "${NETWORK_INTERFACE}" | \
grep 'inet ' | sed 's|[^0-9\.\/]*||g' | cut -d '/' -f 1)
CONTAINER_NETWORK="$(echo "${CONTAINER_IP}" | cut -d '.' -f1-2).0.0"
while read -r IP
do
CONTAINER_NETWORKS+=("${IP}")
done < <(ip -o -4 addr show type veth | grep -E -o '[0-9\.]+/[0-9]+')
case "${PERMIT_DOCKER}" in
"host" )
_notify 'inf' "Adding ${CONTAINER_NETWORK}/16 to my networks"
postconf -e "$(postconf | grep '^mynetworks =') ${CONTAINER_NETWORK}/16"
echo "${CONTAINER_NETWORK}/16" >> /etc/opendmarc/ignore.hosts
echo "${CONTAINER_NETWORK}/16" >> /etc/opendkim/TrustedHosts
;;
"network" )
_notify 'inf' "Adding docker network in my networks"
postconf -e "$(postconf | grep '^mynetworks =') 172.16.0.0/12"
echo 172.16.0.0/12 >> /etc/opendmarc/ignore.hosts
echo 172.16.0.0/12 >> /etc/opendkim/TrustedHosts
;;
"connected-networks" )
for NETWORK in "${CONTAINER_NETWORKS[@]}"
do
NETWORK=$(_sanitize_ipv4_to_subnet_cidr "${NETWORK}")
_notify 'inf' "Adding docker network ${NETWORK} in my networks"
postconf -e "$(postconf | grep '^mynetworks =') ${NETWORK}"
echo "${NETWORK}" >> /etc/opendmarc/ignore.hosts
echo "${NETWORK}" >> /etc/opendkim/TrustedHosts
done
;;
* )
_notify 'inf' 'Adding container ip in my networks'
postconf -e "$(postconf | grep '^mynetworks =') ${CONTAINER_IP}/32"
echo "${CONTAINER_IP}/32" >> /etc/opendmarc/ignore.hosts
echo "${CONTAINER_IP}/32" >> /etc/opendkim/TrustedHosts
;;
esac
}
function _setup_postfix_virtual_transport
{
_notify 'task' 'Setting up Postfix virtual transport'
if [[ -z ${POSTFIX_DAGENT} ]]
then
_notify 'err' "${POSTFIX_DAGENT} not set."
kill -15 "$(< /var/run/supervisord.pid)"
return 1
fi
postconf -e "virtual_transport = ${POSTFIX_DAGENT}"
}
function _setup_postfix_override_configuration
{
_notify 'task' 'Setting up Postfix Override configuration'
if [[ -f /tmp/docker-mailserver/postfix-main.cf ]]
then
while read -r LINE
do
# all valid postfix options start with a lower case letter
# http://www.postfix.org/postconf.5.html
if [[ ${LINE} =~ ^[a-z] ]]
then
postconf -e "${LINE}"
fi
done < /tmp/docker-mailserver/postfix-main.cf
_notify 'inf' "Loaded 'config/postfix-main.cf'"
else
_notify 'inf' "No extra postfix settings loaded because optional '/tmp/docker-mailserver/postfix-main.cf' not provided."
fi
if [[ -f /tmp/docker-mailserver/postfix-master.cf ]]
then
while read -r LINE
do
if [[ ${LINE} =~ ^[0-9a-z] ]]
then
postconf -P "${LINE}"
fi
done < /tmp/docker-mailserver/postfix-master.cf
_notify 'inf' "Loaded 'config/postfix-master.cf'"
else
_notify 'inf' "No extra postfix settings loaded because optional '/tmp/docker-mailserver/postfix-master.cf' not provided."
fi
_notify 'inf' "set the compatibility level to 2"
postconf compatibility_level=2
}
function _setup_postfix_sasl_password
{
_notify 'task' 'Setting up Postfix SASL Password'
# support general SASL password
rm -f /etc/postfix/sasl_passwd
if [[ -n ${SASL_PASSWD} ]]
then
echo "${SASL_PASSWD}" >> /etc/postfix/sasl_passwd
fi
# install SASL passwords
if [[ -f /etc/postfix/sasl_passwd ]]
then
chown root:root /etc/postfix/sasl_passwd
chmod 0600 /etc/postfix/sasl_passwd
_notify 'inf' "Loaded SASL_PASSWD"
else
_notify 'inf' "Warning: 'SASL_PASSWD' is not provided. /etc/postfix/sasl_passwd not created."
fi
}
function _setup_postfix_default_relay_host
{
_notify 'task' 'Applying default relay host to Postfix'
_notify 'inf' "Applying default relay host ${DEFAULT_RELAY_HOST} to /etc/postfix/main.cf"
postconf -e "relayhost = ${DEFAULT_RELAY_HOST}"
}
function _setup_postfix_relay_hosts
{
_notify 'task' 'Setting up Postfix Relay Hosts'
[[ -z ${RELAY_PORT} ]] && RELAY_PORT=25
# shellcheck disable=SC2153
_notify 'inf' "Setting up outgoing email relaying via ${RELAY_HOST}:${RELAY_PORT}"
# setup /etc/postfix/sasl_passwd
# --
# @domain1.com postmaster@domain1.com:your-password-1
# @domain2.com postmaster@domain2.com:your-password-2
# @domain3.com postmaster@domain3.com:your-password-3
#
# [smtp.mailgun.org]:587 postmaster@domain2.com:your-password-2
if [[ -f /tmp/docker-mailserver/postfix-sasl-password.cf ]]
then
_notify 'inf' "Adding relay authentication from postfix-sasl-password.cf"
while read -r LINE
do
if ! echo "${LINE}" | grep -q -e "^\s*#"
then
echo "${LINE}" >> /etc/postfix/sasl_passwd
fi
done < /tmp/docker-mailserver/postfix-sasl-password.cf
fi
# add default relay
if [[ -n ${RELAY_USER} ]] && [[ -n ${RELAY_PASSWORD} ]]
then
echo "[${RELAY_HOST}]:${RELAY_PORT} ${RELAY_USER}:${RELAY_PASSWORD}" >> /etc/postfix/sasl_passwd
else
if [[ ! -f /tmp/docker-mailserver/postfix-sasl-password.cf ]]
then
_notify 'warn' "No relay auth file found and no default set"
fi
fi
if [[ -f /etc/postfix/sasl_passwd ]]
then
chown root:root /etc/postfix/sasl_passwd
chmod 0600 /etc/postfix/sasl_passwd
fi
# end /etc/postfix/sasl_passwd
_populate_relayhost_map
postconf -e \
"smtp_sasl_auth_enable = yes" \
"smtp_sasl_security_options = noanonymous" \
"smtp_sasl_password_maps = texthash:/etc/postfix/sasl_passwd" \
"smtp_use_tls = yes" \
"smtp_tls_security_level = encrypt" \
"smtp_tls_note_starttls_offer = yes" \
"smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt" \
"sender_dependent_relayhost_maps = texthash:/etc/postfix/relayhost_map" \
"smtp_sender_dependent_authentication = yes"
}
function _setup_postfix_dhparam
{
_notify 'task' 'Setting up Postfix dhparam'
if [[ ${ONE_DIR} -eq 1 ]]
then
DHPARAMS_FILE=/var/mail-state/lib-shared/dhparams.pem
if [[ ! -f ${DHPARAMS_FILE} ]]
then
_notify 'inf' "Use ffdhe4096 for dhparams (postfix)"
cp -f /etc/postfix/shared/ffdhe4096.pem /etc/postfix/dhparams.pem
else
_notify 'inf' "Use postfix dhparams that was generated previously"
_notify 'warn' "Using self-generated dhparams is considered as insecure."
_notify 'warn' "Unless you known what you are doing, please remove /var/mail-state/lib-shared/dhparams.pem."
# Copy from the state directory to the working location
cp -f "${DHPARAMS_FILE}" /etc/postfix/dhparams.pem
fi
else
if [[ ! -f /etc/postfix/dhparams.pem ]]
then
if [[ -f /etc/dovecot/dh.pem ]]
then
_notify 'inf' "Copy dovecot dhparams to postfix"
cp /etc/dovecot/dh.pem /etc/postfix/dhparams.pem
elif [[ -f /tmp/docker-mailserver/dhparams.pem ]]
then
_notify 'inf' "Copy pre-generated dhparams to postfix"
_notify 'warn' "Using self-generated dhparams is considered as insecure."
_notify 'warn' "Unless you known what you are doing, please remove /var/mail-state/lib-shared/dhparams.pem."
cp /tmp/docker-mailserver/dhparams.pem /etc/postfix/dhparams.pem
else
_notify 'inf' "Use ffdhe4096 for dhparams (postfix)"
cp /etc/postfix/shared/ffdhe4096.pem /etc/postfix/dhparams.pem
fi
else
_notify 'inf' "Use existing postfix dhparams"
_notify 'warn' "Using self-generated dhparams is considered insecure."
_notify 'warn' "Unless you known what you are doing, please remove /etc/postfix/dhparams.pem."
fi
fi
}
function _setup_dovecot_dhparam
{
_notify 'task' 'Setting up Dovecot dhparam'
if [[ ${ONE_DIR} -eq 1 ]]
then
DHPARAMS_FILE=/var/mail-state/lib-shared/dhparams.pem
if [[ ! -f ${DHPARAMS_FILE} ]]
then
_notify 'inf' "Use ffdhe4096 for dhparams (dovecot)"
cp -f /etc/postfix/shared/ffdhe4096.pem /etc/dovecot/dh.pem
else
_notify 'inf' "Use dovecot dhparams that was generated previously"
_notify 'warn' "Using self-generated dhparams is considered as insecure."
_notify 'warn' "Unless you known what you are doing, please remove /var/mail-state/lib-shared/dhparams.pem."
# Copy from the state directory to the working location
cp -f "${DHPARAMS_FILE}" /etc/dovecot/dh.pem
fi
else
if [[ ! -f /etc/dovecot/dh.pem ]]
then
if [[ -f /etc/postfix/dhparams.pem ]]
then
_notify 'inf' "Copy postfix dhparams to dovecot"
cp /etc/postfix/dhparams.pem /etc/dovecot/dh.pem
elif [[ -f /tmp/docker-mailserver/dhparams.pem ]]
then
_notify 'inf' "Copy pre-generated dhparams to dovecot"
_notify 'warn' "Using self-generated dhparams is considered as insecure."
_notify 'warn' "Unless you known what you are doing, please remove /tmp/docker-mailserver/dhparams.pem."
cp /tmp/docker-mailserver/dhparams.pem /etc/dovecot/dh.pem
else
_notify 'inf' "Use ffdhe4096 for dhparams (dovecot)"
cp /etc/postfix/shared/ffdhe4096.pem /etc/dovecot/dh.pem
fi
else
_notify 'inf' "Use existing dovecot dhparams"
_notify 'warn' "Using self-generated dhparams is considered as insecure."
_notify 'warn' "Unless you known what you are doing, please remove /etc/dovecot/dh.pem."
fi
fi
}
function _setup_security_stack
{
_notify 'task' "Setting up Security Stack"
# recreate auto-generated file
local DMS_AMAVIS_FILE=/etc/amavis/conf.d/61-dms_auto_generated
echo "# WARNING: this file is auto-generated." >"${DMS_AMAVIS_FILE}"
echo "use strict;" >>"${DMS_AMAVIS_FILE}"
# Spamassassin
if [[ ${ENABLE_SPAMASSASSIN} -eq 0 ]]
then
_notify 'warn' "Spamassassin is disabled. You can enable it with 'ENABLE_SPAMASSASSIN=1'"
echo "@bypass_spam_checks_maps = (1);" >>"${DMS_AMAVIS_FILE}"
elif [[ ${ENABLE_SPAMASSASSIN} -eq 1 ]]
then
_notify 'inf' "Enabling and configuring spamassassin"
# shellcheck disable=SC2016
SA_TAG=${SA_TAG:="2.0"} && sed -i -r 's|^\$sa_tag_level_deflt (.*);|\$sa_tag_level_deflt = '"${SA_TAG}"';|g' /etc/amavis/conf.d/20-debian_defaults
# shellcheck disable=SC2016
SA_TAG2=${SA_TAG2:="6.31"} && sed -i -r 's|^\$sa_tag2_level_deflt (.*);|\$sa_tag2_level_deflt = '"${SA_TAG2}"';|g' /etc/amavis/conf.d/20-debian_defaults
# shellcheck disable=SC2016
SA_KILL=${SA_KILL:="6.31"} && sed -i -r 's|^\$sa_kill_level_deflt (.*);|\$sa_kill_level_deflt = '"${SA_KILL}"';|g' /etc/amavis/conf.d/20-debian_defaults
SA_SPAM_SUBJECT=${SA_SPAM_SUBJECT:="***SPAM*** "}
if [[ ${SA_SPAM_SUBJECT} == "undef" ]]
then
# shellcheck disable=SC2016
sed -i -r 's|^\$sa_spam_subject_tag (.*);|\$sa_spam_subject_tag = undef;|g' /etc/amavis/conf.d/20-debian_defaults
else
# shellcheck disable=SC2016
sed -i -r 's|^\$sa_spam_subject_tag (.*);|\$sa_spam_subject_tag = '"'${SA_SPAM_SUBJECT}'"';|g' /etc/amavis/conf.d/20-debian_defaults
fi
# activate short circuits when SA BAYES is certain it has spam or ham.
if [[ ${SA_SHORTCIRCUIT_BAYES_SPAM} -eq 1 ]]
then
# automatically activate the Shortcircuit Plugin
sed -i -r 's|^# loadplugin Mail::SpamAssassin::Plugin::Shortcircuit|loadplugin Mail::SpamAssassin::Plugin::Shortcircuit|g' /etc/spamassassin/v320.pre
sed -i -r 's|^# shortcircuit BAYES_99|shortcircuit BAYES_99|g' /etc/spamassassin/local.cf
fi
if [[ ${SA_SHORTCIRCUIT_BAYES_HAM} -eq 1 ]]
then
# automatically activate the Shortcircuit Plugin
sed -i -r 's|^# loadplugin Mail::SpamAssassin::Plugin::Shortcircuit|loadplugin Mail::SpamAssassin::Plugin::Shortcircuit|g' /etc/spamassassin/v320.pre
sed -i -r 's|^# shortcircuit BAYES_00|shortcircuit BAYES_00|g' /etc/spamassassin/local.cf
fi
if [[ -e /tmp/docker-mailserver/spamassassin-rules.cf ]]
then
cp /tmp/docker-mailserver/spamassassin-rules.cf /etc/spamassassin/
fi
if [[ ${SPAMASSASSIN_SPAM_TO_INBOX} -eq 1 ]]
then
_notify 'inf' 'Configure Spamassassin/Amavis to put SPAM inbox'
sed -i "s|\$final_spam_destiny.*=.*$|\$final_spam_destiny = D_PASS;|g" /etc/amavis/conf.d/49-docker-mailserver
sed -i "s|\$final_bad_header_destiny.*=.*$|\$final_bad_header_destiny = D_PASS;|g" /etc/amavis/conf.d/49-docker-mailserver
else
sed -i "s|\$final_spam_destiny.*=.*$|\$final_spam_destiny = D_BOUNCE;|g" /etc/amavis/conf.d/49-docker-mailserver
sed -i "s|\$final_bad_header_destiny.*=.*$|\$final_bad_header_destiny = D_BOUNCE;|g" /etc/amavis/conf.d/49-docker-mailserver
if ! ${SPAMASSASSIN_SPAM_TO_INBOX_IS_SET}
then
_notify 'warn' 'Spam messages WILL NOT BE DELIVERED, you will NOT be notified of ANY message bounced. Please define SPAMASSASSIN_SPAM_TO_INBOX explicitly.'
fi
fi
fi
# Clamav
if [[ ${ENABLE_CLAMAV} -eq 0 ]]
then
_notify 'warn' "Clamav is disabled. You can enable it with 'ENABLE_CLAMAV=1'"
echo '@bypass_virus_checks_maps = (1);' >>"${DMS_AMAVIS_FILE}"
elif [[ ${ENABLE_CLAMAV} -eq 1 ]]
then
_notify 'inf' 'Enabling clamav'
fi
echo '1; # ensure a defined return' >>"${DMS_AMAVIS_FILE}"
chmod 444 "${DMS_AMAVIS_FILE}"
# Fail2ban
if [[ ${ENABLE_FAIL2BAN} -eq 1 ]]
then
_notify 'inf' 'Fail2ban enabled'
if [[ -e /tmp/docker-mailserver/fail2ban-fail2ban.cf ]]
then
cp /tmp/docker-mailserver/fail2ban-fail2ban.cf /etc/fail2ban/fail2ban.local
fi
if [[ -e /tmp/docker-mailserver/fail2ban-jail.cf ]]
then
cp /tmp/docker-mailserver/fail2ban-jail.cf /etc/fail2ban/jail.local
fi
else
# disable logrotate config for fail2ban if not enabled
rm -f /etc/logrotate.d/fail2ban
fi
# fix cron.daily for spamassassin
sed -i -e 's|invoke-rc.d spamassassin reload|/etc/init\.d/spamassassin reload|g' /etc/cron.daily/spamassassin
# copy user provided configuration files if provided
if [[ -f /tmp/docker-mailserver/amavis.cf ]]
then
cp /tmp/docker-mailserver/amavis.cf /etc/amavis/conf.d/50-user
fi
}
function _setup_logrotate
{
_notify 'inf' 'Setting up logrotate'
LOGROTATE='/var/log/mail/mail.log\n{\n compress\n copytruncate\n delaycompress\n'
case "${LOGROTATE_INTERVAL}" in
'daily' )
_notify 'inf' 'Setting postfix logrotate interval to daily'
LOGROTATE="${LOGROTATE} rotate 4\n daily\n"
;;
'weekly' )
_notify 'inf' 'Setting postfix logrotate interval to weekly'
LOGROTATE="${LOGROTATE} rotate 4\n weekly\n"
;;
'monthly' )
_notify 'inf' 'Setting postfix logrotate interval to monthly'
LOGROTATE="${LOGROTATE} rotate 4\n monthly\n"
;;
* )
_notify 'warn' 'LOGROTATE_INTERVAL not found in _setup_logrotate'
;;
esac
echo -e "${LOGROTATE}}" >/etc/logrotate.d/maillog
}
function _setup_mail_summary
{
_notify 'inf' "Enable postfix summary with recipient ${PFLOGSUMM_RECIPIENT}"
case "${PFLOGSUMM_TRIGGER}" in
'daily_cron' )
_notify 'inf' 'Creating daily cron job for pflogsumm report'
echo '#! /bin/bash' > /etc/cron.daily/postfix-summary
echo "/usr/local/bin/report-pflogsumm-yesterday ${HOSTNAME} ${PFLOGSUMM_RECIPIENT} ${PFLOGSUMM_SENDER}" >>/etc/cron.daily/postfix-summary
chmod +x /etc/cron.daily/postfix-summary
;;
'logrotate' )
_notify 'inf' 'Add postrotate action for pflogsumm report'
sed -i \
"s|}| postrotate\n /usr/local/bin/postfix-summary ${HOSTNAME} ${PFLOGSUMM_RECIPIENT} ${PFLOGSUMM_SENDER}\n endscript\n}\n|" \
/etc/logrotate.d/maillog
;;
'none' )
_notify 'inf' 'Postfix log summary reports disabled.'
;;
* )
_notify 'err' 'PFLOGSUMM_TRIGGER not found in _setup_mail_summery'
;;
esac
}
function _setup_logwatch
{
_notify 'inf' "Enable logwatch reports with recipient ${LOGWATCH_RECIPIENT}"
echo 'LogFile = /var/log/mail/freshclam.log' >>/etc/logwatch/conf/logfiles/clam-update.conf
case "${LOGWATCH_INTERVAL}" in
'daily' )
_notify 'inf' "Creating daily cron job for logwatch reports"
echo "#! /bin/bash" > /etc/cron.daily/logwatch
echo "/usr/sbin/logwatch --range Yesterday --hostname ${HOSTNAME} --mailto ${LOGWATCH_RECIPIENT}" \
>>/etc/cron.daily/logwatch
chmod 744 /etc/cron.daily/logwatch
;;
'weekly' )
_notify 'inf' "Creating weekly cron job for logwatch reports"
echo "#! /bin/bash" > /etc/cron.weekly/logwatch
echo "/usr/sbin/logwatch --range 'between -7 days and -1 days' --hostname ${HOSTNAME} --mailto ${LOGWATCH_RECIPIENT}" \
>>/etc/cron.weekly/logwatch
chmod 744 /etc/cron.weekly/logwatch
;;
'none' )
_notify 'inf' 'Logwatch reports disabled.'
;;
* )
_notify 'warn' 'LOGWATCH_INTERVAL not found in _setup_logwatch'
;;
esac
}
function _setup_user_patches
{
local USER_PATCHES="/tmp/docker-mailserver/user-patches.sh"
if [[ -f ${USER_PATCHES} ]]
then
_notify 'tasklog' 'Applying user patches'
chmod +x "${USER_PATCHES}"
${USER_PATCHES}
else
_notify 'inf' "No optional '/tmp/docker-mailserver/user-patches.sh' provided. Skipping."
fi
}
function _setup_environment
{
_notify 'task' 'Setting up /etc/environment'
if ! grep -q "# Docker Mail Server" /etc/environment
then
echo "# Docker Mail Server" >>/etc/environment
echo "VIRUSMAILS_DELETE_DELAY=${VIRUSMAILS_DELETE_DELAY}" >>/etc/environment
fi
}
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