Hey guys since three days I am stuck with a problem and it seems to me I am blind for the solution by digging into it so much, so I need your help to have a look at it please!
our server is up and running dovecot/postfix on debian 8 for three years by now, without any problems. I urgently needed to set up some mailinglists and choose mailman for it (what else?). I thought everything went fine till I tried to test my installation and discovered that, when I try to send from an internal emailaddress (managed by the server itself) I get an "User doesn't exist" error and if I send an email from an external service like gmail, I get "relay access denied". Like I've said, I tried to fix this problem for over three days now and can't see my mistake. I uploaded my config files at HowtoForge, where you can have a look at it: https://www.howtoforge.com/community/threads/postfix-mailman-debian8.72052/ Greetings and thank you in advance for your help Walter
