Ray wrote:
Alice (al...@example.com) sends Bob an Email (b...@myserver.com) CC
(b...@3rdserver.com) I run myserver.com. message goes through to
b...@3rdserver.com, but not b...@myserver.com.
there is absolutely no trace of alice's domain in the mail logs.
Do you have "smtpd_delay_reject = yes" set in main.cf? If not, searching
for Alice's domain might not help. In that case, you'd need to search
for her outgoing mail server's IP address in your logs to see why it is
unable to connect to your server. Note that it may not be easy (read:
possible) to determine that IP address without assistance.
If either,
a) you have set smtpd_delay_reject = yes
b) you don't, but can't find her outgoing server IP in the logs, either
then the message is never making it to Postfix. Regardless, the easiest
and most straight-forward way to solve this is for Alice's mail admin to
find out where her message went. Even if it's ultimately your fault, he
or she has a better view of the problem.