A. Schulze: > Hello, > > we're facing the following problem: > postfix is configured to verify recipient addresses. The backend servers are > mostly Exchange in various versions. > Many of them use tarpitting. We guess that are default values. > The address probe sent by postfix receive a result after 5 seconds delay. > reason: tarpitting. > Meanwhile postfix accept the message and we generate bounces later :-/
That's because you configured it to accept mail. http://www.postfix.org/postconf.5.html#unverified_recipient_tempfail_action http://www.postfix.org/postconf.5.html#unverified_sender_tempfail_action Wietse
