My postfix configured by ISPconfig is just routing mails for some domains to backend groupwise mail system, running well since years. No the is an external website where I can create mails to users in the whole world but they should come grom my my mailservers, so that the receipients should see they com from me at my domain. If I set this external IP adress in mynetworks, it is accepted but complains about invalid SASL authentification. Can I configer this in ISPconfig or have I configure it manually and the the next modificationin ISPconfig gor that postfix will not destroy it
to explain postfix is only relaying, so no local users can I confure postfix to receive and relais mails from a specific address on the net without further authentication in ISPconfig and if not is it posible manual and how, and does ISPconfig not overwrite on next chance
thats what i did, but the sender send an authentiation user and password and so postfix does not accept the mail. But some minutes before I had the solution. I created dummy local domain and added a user with password there. Then entered these credentials in the sending application and the mails are accepted and paased through the relay to their destination. So it is solved.
