#! /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 = /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 }