wietse:
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
ok, thanks
I currently fail on reproducint the "error". Maybe because my server
isn't under stress now.
May I force smtpd act with stress=1 for a specific smtp client?
@Viktor:
yes, you're right, our back-end servers shouldn't tarpitting our
front-end servers.
but that's a long term goal and require reconfiguration on customers
back-end servers...
Andreas
