07-15-2016
Searching the net for
client=unknown, I found
this (in German),
this, and the
postfix.org site saying
Quote:
If Postfix logs the SMTP client as "unknown" then you have a name service problem: the name server is bad, or the resolv.conf file contains bad information, or some packet filter is blocking the DNS requests or replies.
BTW, are you running
postfix?
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LEARN ABOUT DEBIAN
postfix-add-policy
POSTFIX-ADD-POLICY(8) System Manager's Manual POSTFIX-ADD-POLICY(8)
NAME
postfix-add-policy - add policy service to Postfix master.cf
SYNOPSIS
postfix-add-policy [policy name...] [username...] [argv...]
DESCRIPTION
The postfix-add-policy(8) command adds an smtp policy server named policy name running using username and called as argv to etc/post-
fix/master.cf to facilitate integration of SMTP policy servers such as postgrey or postfix-policyd-spf-perl. The configuration is based on
the Postfix SMTPD_POLICY_README. Adminstrators should verify it is appropriate for their requirements.
The original file is copied prior to modification and left in /etc/postfix to make it possible to revert changes easily.
Available in the Debian package for Postfix version 2.5.3 and later.
DIAGNOSTICS
If the given policy name already appears in the master.cf, a message will be printed to standard out and master.cf will not be modified.
ENVIRONMENT
MAIL_CONFIG
Directory with Postfix configuration files.
The postfix-add-policy(8) command should use this, but it currently doesn't. It is hard coded to /etc/postfix. This should be
changed.
CONFIGURATION PARAMETERS
None
FILES
/etc/postfix/master.cf
SEE ALSO
postconf(5), Postfix configuration
LICENSE
This software is licensed under the MIT open source license.
AUTHOR(S)
Scott Kitterman
<scott@kitterman.com>
POSTFIX-ADD-POLICY(8)