From: - Kone Bakenon - (koneuniv-ouaga.bf)
Date: Wed Aug 09 2006 - 12:27:22 CDT

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> - Kone Bakenon - wrote:
>>> - Kone Bakenon - wrote:
>>>> Hello all,
>>>> Since day before yesterday, i have a lots of of message like that in
>>>> my
>>>> log :
>>>>
>>>> Aug 9 10:03:12 mail postfix/smtpd[11364]: connect from
>>>> mail.magicjent.com[63.207.43.210]
>>>> Aug 9 10:03:12 mail postfix/smtpd[11373]: NOQUEUE: reject: RCPT from
>>>> mx1.iml.com[204.92.14.10]: 450 <LarryzYxGreenmydomain.com>: Recipient
>>>> address rejected: User unknown in local recipient table; from=<>
>>>> to=<LarryzYxGreenmydomain.com> proto=ESMTP helo=<mx1.iml.com>
>>>> Aug 9 10:03:12 mail postfix/smtpd[11289]: disconnect from
>>>> unknown[206.159.183.93]
>>>> Aug 9 10:03:13 mail postfix/smtpd[11341]: connect from
>>>> defout.telus.net[199.185.220.240]
>>>>
>>> As others already said, this looks like backscatter mails from badly
>>> configured servers. If your recipient validation is working correctly
>>> you
>>> might want to change the 450 tempfail of unknown recipient to 550
>>> permanent rejection:
>>>
>>> unknown_local_recipient_reject_code = 550
>>
>> I add the previous line and restart postfix but i still have the same
>> log.
>
> Are undeliverable mails to not existing users rejected with 450 or 550?
> They should be permanently rejected. You will still see one NOQUEUE:
> reject, but the sending server will not try to resend this particular
> mail.
>
Log looks like that :
Aug 9 17:11:04 mail postfix/smtpd[24915]: NOQUEUE: reject: RCPT from
purify.attnet.ne.jp[165.76.8.44]: 550 <RichardvNzPhillipsmydomain.com>:
Recipient address rejected: User unknown in local recipient table; from=<>
to=<RichardvNzPhillipsuniv-ouaga.bf> proto=ESMTP
helo=<purify03.attnet.ne.jp>

Aug 9 17:11:04 mail postfix/smtpd[25109]: NOQUEUE: reject: RCPT from
unknown[200.38.219.131]: 450 Client host rejected: cannot find your
hostname, [200.38.219.131]; from=<servermailgrupolala.com>
to=<RonaldayaYounguniv-ouaga.bf> proto=ESMTP
helo=<servermail.grupolala.com>

> Please verify with "postconf unknown_local_recipient_reject_code" that
> your reject code has been changed to 550. This will only work for
> recipient domain in $mydestination, for recipients in $relay_domains
> please set unknown_relay_recipient_reject_code.
>

unknown_local_recipient_reject_code = 550

> Sandy
>

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