On Thu, Aug 26, 2021 at 12:57:14PM -0400, post...@ptld.com wrote:
> NOQUEUE: reject: RCPT from unknown[196.188.245.169]: 550 5.1.0
> <u...@example.com>: Sender address rejected: User unknown in virtual
> mailbox table; from=<u...@example.com> to=<u...@example.com> proto=ESMTP
> helo=<[196.188.245.169]>
The built-in defaults are:
smtpd_reject_unlisted_recipient = yes
smtpd_reject_unlisted_sender = no
> In that case is postfix rejecting based on the From: or the To: not
> being a valid user?
The log message says "Sender address rejected".
> Why is postfix checking either when smtpd_reject_unlisted_recipient =
> no?
Perhaps you have "smtpd_reject_unlisted_sender = yes"?
--
Viktor.
