From: Bill Cole (postfixlists-070913billmail.scconsult.com)
Date: Tue Jan 08 2008 - 16:47:33 CST

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At 4:05 PM -0600 1/8/08, JD Bronson wrote:
>I get these all day long. I have only slightly munged the headers.
>I have 38.100.164.102 and other IPs like it listed in client_checks
>so the email is permitted - but these are always logged..
>
>Is there anything I can whitelist these MORE so that the email is
>accepted without logging this?

The mail is already being accepted, and unless you are using
reject_unknown_client_hostname (with Postfix < 2.3:
reject_unknown_client) you are at no risk of rejecting these for the
logged problem with their DNS and do not need to whitelist the IP
address at all. Given the widespread problem of carelessly configured
and unreliable DNS, using reject_unknown_client_hostname is a risky
choice anyway.

If you can get the people running that system to handle their DNS
competently, you can get their problem solved and Postfix will no
longer have anything to warn about.

The log entries themselves cannot be configured away with Postfix
without losing a lot of log entries that you probably want to keep.
You could always hack the code to eliminate them if you prefer that
over simply deciding to ignore them them.

>thanks!
>
>Jan 8 01:33:32 cheyenne postfix/smtpd[4442]: warning:
>38.100.164.102: hostname snl03.whattoexpect.com verification failed:
>No address associated with hostname
>
>Jan 8 01:33:32 cheyenne postfix/smtpd[4442]: connect from
>unknown[38.100.164.102]
>
>Jan 8 01:33:36 cheyenne postfix/smtpd[4442]: A12A0602AB:
>client=unknown[38.100.164.102]
>
>Jan 8 01:33:36 cheyenne postfix/cleanup[4172]: A12A0602AB:
>message-id=<20080108073336.A12A0602ABcheyenne.X.X>
>
>Jan 8 01:33:36 cheyenne postfix/qmgr[918]: A12A0602AB:
>from=<losingityournewsletters.net>, size=19799, nrcpt=1 (queue
>active)
>
>Jan 8 01:33:36 cheyenne postfix/local[4451]: A12A0602AB:
>to=<usermydomain.com>, relay=local, delay=0.24,
>delays=0.22/0.01/0/0, dsn=2.0.0, status=sent (delivered to mailbox)
>
>Jan 8 01:33:36 cheyenne postfix/qmgr[918]: A12A0602AB: removed
>Jan 8 01:33:36 cheyenne postfix/smtpd[4442]: disconnect from
>unknown[38.100.164.102]

--
Bill Cole
billscconsult.com

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