Docker setup: add Postfix workaround DNS

This ensures that name resolution settings are available in chrooted Postfix services.
UtrechtUniversity · Jan 23, 2025 · 1df189f · 1df189f
1 parent 4bbd6a3
commit 1df189f
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/docker/images/mta/mta-entrypoint.sh b/docker/images/mta/mta-entrypoint.sh
@@ -3,11 +3,15 @@
 if [ "$MTA_ROLE" == "mailpit" ]
 then BINDIP=$(ip addr | grep eth0 | grep inet | awk '{print $2}' | cut -d '/' -f 1)
      /mailpit.bin -s $BINDIP:25 --webroot mailpit
+
 elif [ "$MTA_ROLE" == "postfix" ]
 then echo "[$POSTFIX_RELAYHOST_FQDN]:$POSTFIX_RELAYHOST_PORT $POSTFIX_RELAYHOST_USERNAME:$POSTFIX_RELAYHOST_PASSWORD" > /etc/postfix/sasl_passwd
      cd /etc/postfix
      postmap sasl_passwd
 
+     # Needed to make name resolution work for Postfix
+     cp /etc/resolv.conf /var/spool/postfix/etc/resolv.conf
+
      # Update configuration values
 
      if [ "$POSTFIX_RELAYHOST_AUTH_ENABLED" == "yes" ]