Brian Candler writes:
courieresmtpd: error,relay=::ffff:XXX.XXX.XXX.XXX,msg="502 ESMTP command
error",cmd: AUTH PLAIN xxxxx
502 = Command not implemented (RFC 2821).
RFC 2554 says:
"If the requested authentication mechanism is not
supported, the server rejects the AUTH command with a 504 reply."
So it's not a problem with AUTH PLAIN; it's that courieresmtpd doesn't
implement AUTH at all.
What happens if you type "EHLO anything"? Does it list AUTH in the list of
I knew there should be a way to get it to list what it supports, but
couldn't remember it. Thanks! Anyway, I tried EHLO and got:
So I guess the answer is no, it doesn't support AUTH. What gives? When I
originally built Courier I used: ./configure --prefix=/opt/courier