From 0b410ad6d88ae3cb5f0e886907130e48df850fdc Mon Sep 17 00:00:00 2001
From: Christoph <ckubu@oopen.de>
Date: Mon, 27 Jan 2025 17:02:08 +0100
Subject: [PATCH] install_postfix_base.sh: support relaying to non standard
 port (other than 25).

---
 install_postfix_base.sh | 56 ++++++++++++++++++++++++++++++++++++++---
 1 file changed, 53 insertions(+), 3 deletions(-)

diff --git a/install_postfix_base.sh b/install_postfix_base.sh
index 1d305bd..b93285f 100755
--- a/install_postfix_base.sh
+++ b/install_postfix_base.sh
@@ -129,6 +129,7 @@ detect_os_1 () {
 
 DEFAULT_ADMIN_EMAIL="argus@oopen.de"
 DEFAULT_RELAY_HOST="b.mx.oopen.de"
+DEFAULT_RELAY_PORT=25
 DEFAULT_SASL_AUTH=false
 DEFAULT_REWRITE_SENDER_DOMAIN=None
 
@@ -340,11 +341,12 @@ fi
 # --- Some further default values depending on sasl authentification
 # -------------
 
-# - Set default value for relay host if sasl authentification should be
-# - supported and value for _RELAY_HOST not given
+# - Set default value for relay host / relay port if sasl authentification should be
+# - supported and value for _RELAY_HOST / _RELAY_PORT not given
 # -
 if [[ "$SASL_AUTH" = "yes" ]] || $SASL_AUTH ; then
    [[ -z "$_RELAY_HOST" ]] && _RELAY_HOST="$DEFAULT_RELAY_HOST"
+   [[ -z "$_RELAY_PORT" ]] && _RELAY_PORT="$DEFAULT_RELAY_PORT"
 fi
 
 if [[ -z ${_REWRITE_SENDER_DOMAIN} ]] ; then
@@ -415,6 +417,27 @@ if [[ "$SASL_AUTH" = "yes" ]] || $SASL_AUTH ; then
       done
    fi
 
+
+   RELAY_PORT=
+   echo ""
+   echo "Insert the target port to connect to ${RELAY_HOST}"
+   echo ""
+   if [[ -n "$_RELAY_PORT" ]];then
+      echononl "(target) Port on ${RELAY_HOST} [$_RELAY_PORT]: "
+      read RELAY_PORT
+      if [[ "X${RELAY_PORT}" = "X" ]]; then
+         RELAY_PORT=$_RELAY_PORT
+      fi
+   else
+      while [[ "X${RELAY_PORT}" = "X" ]]; do
+         echononl "(target) Port on ${RELAY_HOST}: "
+         read RELAY_PORT
+         if [[ "X${RELAY_PORT}" = "X" ]]; then
+            echo -e "\n\t\033[33m\033[1mi(target) Port of ${RELAY_HOST} is reqired\033[m\n"
+         fi
+      done
+   fi
+
 else
    SASL_AUTH=false
 fi
@@ -467,6 +490,7 @@ if $SASL_AUTH ; then
    echo -e "\t   sasl user.............: $SASL_USER"
    echo -e "\t   sasl password.........: $SASL_PASS"
    echo -e "\t   Relayhost.............: $RELAY_HOST"
+   echo -e "\t   Port on Relayhost.....: $RELAY_PORT"
 fi
 echo ""
 echononl "einverstanden (yes/no): "
@@ -498,6 +522,7 @@ _SASL_AUTH=$SASL_AUTH
 _SASL_USER=$SASL_USER
 _SASL_PASS=$SASL_PASS
 _RELAY_HOST=$RELAY_HOST
+_RELAY_PORT=$RELAY_PORT
 _REWRITE_SENDER_DOMAIN=$REWRITE_SENDER_DOMAIN
 EOF
 if [[ $? -eq 0 ]] ; then
@@ -801,9 +826,24 @@ smtp_sasl_auth_enable = yes
 
 # Only offer SMTP AUTH when talking over an encrypted connection
 smtpd_tls_auth_only = yes
+EOF
+
+   if [[ ${RELAY_PORT} -ne 25 ]] ; then
+      cat <<EOF >> /etc/postfix/main.cf
+
+# Forwarding to the ip-adress of host b.mx.oopen.de
+relayhost = [${RELAY_HOST}]:${RELAY_PORT}
+EOF
+   else
+      cat <<EOF >> /etc/postfix/main.cf
 
 # Forwarding to the ip-adress of host b.mx.oopen.de
 relayhost = [${RELAY_HOST}]
+EOF
+
+   fi
+
+   cat <<EOF >> /etc/postfix/main.cf
 
 # File including login data
 smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
@@ -1064,7 +1104,11 @@ echononl "   Configure SASL authentification"
 if $SASL_AUTH ; then
 
    _failed=false
-   echo "[$RELAY_HOST] ${SASL_USER}@${RELAY_HOST}:$SASL_PASS" > /etc/postfix/sasl_passwd
+   if [[ ${RELAY_PORT} -ne 25 ]] ; then
+      echo "[$RELAY_HOST]:${RELAY_PORT} ${SASL_USER}@${RELAY_HOST}:$SASL_PASS" > /etc/postfix/sasl_passwd
+   else
+      echo "[$RELAY_HOST] ${SASL_USER}@${RELAY_HOST}:$SASL_PASS" > /etc/postfix/sasl_passwd
+   fi
    if [[ "$?" != "0" ]]; then
       error "Setting \"/etc/postfix/sasl_passwd\" failed! "
       _failed=true
@@ -1410,6 +1454,12 @@ else
    fi
 fi
 
+if [[ ${RELAY_PORT} -ne 25 ]] ; then
+
+   echo ""
+   warn "Please do not forget to allow port \033[1m${RELAY_PORT}\033[m on both sides, outgoing here 
+                     on this host here and incoming on the relay host '${RELAY_HOST}'."
+fi
 
 echo ""
 clean_up 0