Right, the envelope sender (as in SMTP MAIL FROM: command) needs to be
af@afmug.com to avoid trouble. The From: header could be you, me, or
your cousin's sister's brother without hurting anything. The From:
header is part of the message content. The envelope sender is part of
the SMTP transaction.
On our own mail server (where we don't run a mailing list) we do require
the envelope sender to be a real account on our system because it makes
it easier to track down spambot malware BS, which would otherwise use
that capability to make the source less obvious. I assume Amazon has a
similar requirement.
No, just no. Know the difference between the sender and the envelope
sender.
~Seth
