Trying hard to enable replies by email using the mail-receiver container. I consistently get errors:
NOQUEUE: reject: RCPT from ... 454 4.7.1 <...>: Relay access denied
Why is this? How can I get into the mail-receiver container and examine the postfix config and debug it? I have disabled the postfix server on the system on which this is running, because of clash with port 25. Is that wrong?
I am reasonably sure DNS MX records are right, and this happens from any server sending mail inbound, I am using Amazon SES for outbound in the app container and that works fine.
I am a Discourse newbie and I dont know how to debug the ecosystem. I am an expert in postfix, but I don’t know how to configure it in this containerized universe.