feat: Introduce ENABLE_AMAVIS env (#1866)

* Introduce ENABLE_AMAVIS env

* missing 'fi' added

* documentation added

* add condition for amavis fix function

* Fix spelling

Co-authored-by: William Desportes <williamdes@wdes.fr>

* Fix spelling

Co-authored-by: William Desportes <williamdes@wdes.fr>

Co-authored-by: William Desportes <williamdes@wdes.fr>
Co-authored-by: Frederic Werner <20406381+wernerfred@users.noreply.github.com>

ENVIRONMENT.md

@@ -27,6 +27,13 @@ Here you can adjust the [log-level for Supervisor](http://supervisord.org/loggin
 
 The log-level will show everything in its class and above.
 
+##### ENABLE_AMAVIS
+
+Amavis content filter (used for ClamAV & SpamAssassin)
+
+- 0 => Amavis is disabled
+- **1** => Amavis is enabled
+
 ##### ENABLE_CLAMAV
 
 - **0** => Clamav is disabled

mailserver.env

@@ -64,6 +64,11 @@ ENABLE_SRS=0
 ENABLE_POP3=
 ENABLE_CLAMAV=0
 
+# Amavis content filter (used for ClamAV & SpamAssassin)
+# 0 => Disabled
+# 1 => Enabled
+ENABLE_AMAVIS=1
+
 # If you enable Fail2Ban, don't forget to add the following lines to your `docker-compose.yml`:
 #    cap_add:
 #      - NET_ADMIN

target/scripts/start-mailserver.sh

@@ -20,6 +20,7 @@ VARS[DEFAULT_RELAY_HOST]="${DEFAULT_RELAY_HOST:=}"
 VARS[DMS_DEBUG]="${DMS_DEBUG:=0}"
 VARS[DOVECOT_MAILBOX_FORMAT]="${DOVECOT_MAILBOX_FORMAT:=maildir}"
 VARS[DOVECOT_TLS]="${DOVECOT_TLS:=no}"
+VARS[ENABLE_AMAVIS]="${ENABLE_AMAVIS:=1}"
 VARS[ENABLE_CLAMAV]="${ENABLE_CLAMAV:=0}"
 VARS[ENABLE_FAIL2BAN]="${ENABLE_FAIL2BAN:=0}"
 VARS[ENABLE_FETCHMAIL]="${ENABLE_FETCHMAIL:=0}"
@@ -149,7 +150,7 @@ function register_functions
   # ? >> Fixes
 
   _register_fix_function '_fix_var_mail_permissions'
-  _register_fix_function '_fix_var_amavis_permissions'
+  [[ ${ENABLE_AMAVIS} -eq 1 ]] && _register_fix_function '_fix_var_amavis_permissions'
 
   [[ ${ENABLE_CLAMAV} -eq 0 ]] && _register_fix_function '_fix_cleanup_clamav'
   [[ ${ENABLE_SPAMASSASSIN} -eq 0 ]] &&	_register_fix_function '_fix_cleanup_spamassassin'
@@ -180,8 +181,7 @@ function register_functions
   [[ ${ENABLE_FETCHMAIL} -eq 1 ]] && _register_start_daemon '_start_daemons_fetchmail'
   [[ ${ENABLE_CLAMAV} -eq 1 ]] &&	_register_start_daemon '_start_daemons_clamav'
   [[ ${ENABLE_LDAP} -eq 0 ]] && _register_start_daemon '_start_changedetector'
-
-  _register_start_daemon '_start_daemons_amavis'
+  [[ ${ENABLE_AMAVIS} -eq 1 ]] && _register_start_daemon '_start_daemons_amavis'
 }
 
 function _register_start_daemon

target/scripts/startup/setup-stack.sh

@@ -128,10 +128,16 @@ function _setup_mailname
 
 function _setup_amavis
 {
+  if [[ ${ENABLE_AMAVIS} -eq 1 ]]
+  then
     _notify 'task' 'Setting up Amavis'
     sed -i \
       "s|^#\$myhostname = \"mail.example.com\";|\$myhostname = \"${HOSTNAME}\";|" \
       /etc/amavis/conf.d/05-node_id
+  else
+    _notify 'task' 'Remove Amavis from postfix configuration'
+    sed -i 's|content_filter =.*|content_filter =|' /etc/postfix/main.cf
+  fi
 }
 
 function _setup_dmarc_hostname
@@ -1475,11 +1481,15 @@ function _setup_security_stack
   # 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
+  # Amavis
+  if [[ ${ENABLE_AMAVIS} -eq 1 ]]
+  then
+    _notify 'inf' 'Amavis enabled'
     if [[ -f /tmp/docker-mailserver/amavis.cf ]]
     then
       cp /tmp/docker-mailserver/amavis.cf /etc/amavis/conf.d/50-user
     fi
+  fi
 }
 
 function _setup_logrotate