install_amavis.sh,install_postfix_advanced.sh: support additional smtp port in case of relay host.

install_amavis.sh

@@ -5034,6 +5034,12 @@ if grep -iq -E "^amavisfeed\s+" $postfix_master_cf > /dev/null 2>&1 ; then
 else
    amavisfeed_present=false
 fi
+if grep -iq -E "^[0-9]{2,5}\s+inet.*smtpd" $postfix_master_cf > /dev/null 2>&1 ; then
+   listen_on_additional_smtp_port=true
+   additional_smtp_port="$(grep -E "^[0-9]{2,5}\s+inet.*smtpd" /etc/postfix/master.cf | grep -o -E "^[0-9]{2,5}")"
+else
+   listen_on_additional_smtp_port=false
+fi
 
 > $postfix_master_cf
 while IFS='' read -r _line || [[ -n $_line ]] ; do
@@ -5051,6 +5057,19 @@ EOF
 EOF
       fi
 
+      if ${listen_on_additional_smtp_port} ; then
+         cat >> $postfix_master_cf << EOF
+${additional_smtp_port}      inet  n       -       y       -       -       smtpd
+   -o smtpd_proxy_filter=127.0.0.1:10024
+   -o content_filter=
+EOF
+         if [[ "$SASL_AUTH_ENABLED" = "no" ]] ; then
+            cat >> $postfix_master_cf << EOF
+   -o smtpd_sasl_auth_enable=no
+EOF
+         fi
+      fi
+
 		if ! $submission_present && ! $smtps_present && ! $localhost_10025_present ; then
 					cat >> $postfix_master_cf << EOF
 localhost:10025  inet  n       -       y       -       -       smtpd
@@ -5305,6 +5324,13 @@ else
    fi
 fi
 
+if ${listen_on_additional_smtp_port}: then
+
+   echo ""
+   warn "Please do not forget to allow incomming traffic on port \033[1m${additional_smtp_port}\033[m.
+                     Check your firewall settings.."
+fi
+
 
 #fi # if $ommit ; then
 # -------------------------------