Noel Jones escribió:
Miguel Da Silva - Centro de Matemática wrote:
Dear users, I'm quite suprised seeing this kind of messages at the
mail server:
Aug 29 17:19:31 mordred postfix/smtpd[23160]: connect from
fder1.fder.edu.uy[164.73.178.2]
Aug 29 17:19:32 mordred postfix/smtpd[23160]: setting up TLS
connection from fder1.fder.edu.uy[164.73.178.2]
Aug 29 17:19:32 mordred postfix/smtpd[23160]: TLS connection
established from fder1.fder.edu.uy[164.73.178.2]: TLSv1 with cipher
DHE-RSA-AES256-SHA (256/256 bits)
Aug 29 17:19:32 mordred postfix/smtpd[23160]: NOQUEUE: reject: RCPT
from fder1.fder.edu.uy[164.73.178.2]: 450 4.1.1 <[EMAIL PROTECTED]
.edu.uy>: Recipient address rejected: undeliverable address: unknown
user: "wferrer"; from=<[EMAIL PROTECTED]> to=<[EMAIL PROTECTED]
.edu.uy> proto=ESMTP helo=<fder1.fder.edu.uy>
Aug 29 17:19:32 mordred postfix/cleanup[23315]: AEAAC131057:
message-id=<[EMAIL PROTECTED]>
Aug 29 17:19:32 mordred postfix/qmgr[10250]: AEAAC131057:
from=<[EMAIL PROTECTED]>, size=267, nrcpt=1 (queue active)
Aug 29 17:19:32 mordred postfix/local[23139]: AEAAC131057:
to=<[EMAIL PROTECTED]>, relay=local, delay=0.01, delays=0/0/0/0, dsn
=5.1.1, status=undeliverable (unknown user: "wferrer")
Aug 29 17:19:32 mordred postfix/qmgr[10250]: AEAAC131057: removed
First, a remote serve tries to send a mail to an unknown user and the
server reject it. That's ok and I do remember configuring Postfix to
do this.
But then, the local server (postmaster) tries to send a message to the
same user. At the 17:19:32 it was the very first time the id
AEAAC131057 appears, so this message is somehow related with the other
coming from the remote server.
Any suggestions?! Maybe I'm reading the logs the wrong way.
Greetings.
Do you remember reading this
http://www.postfix.org/ADDRESS_VERIFICATION_README.html#recipient
and adding "reject_unverified_recipient" somewhere in your main.cf?
The message sent from postmaster to the unknown user is the verification
probe. The clue is "status=undeliverable" or "status=deliverable" is
only logged by verification probes.
As a side note, consider setting in your main.cf:
unverified_recipient_reject_code = 550
to permanently reject unknown recipients, rather than telling the remote
mail server to retry again and again.
http://www.postfix.org/postconf.5.html#unverified_recipient_reject_code
Simple like that!!! :)
Really thank you... I could not find in documentation what would look
like the probe mentioned.
Thank you.
--
Miguel Da Silva
Administrador Junior de Sistemas Unix
Centro de Matemática - http://www.cmat.edu.uy
Facultad de Ciencias - http://www.fcien.edu.uy
Universidad de la República - http://www.rau.edu.uy
