From: Ralf Hildebrandt (Ralf.Hildebrandtcharite.de)
Date: Tue Jul 03 2007 - 13:29:13 CDT

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* Gianluca Culot <gianlucaculotdmsware.com>:
> Hello list
>
> I'm facing a question posed by a user of mine.
>
> My user is blaming that the Non Deliverable message has arrived after 6 days!
>
> Which is a little too high for my tastes too!
>
> ***********************************************
> Reporting-MTA: dns; mail.dmsware.com
> X-Postfix-Queue-ID: 25DF25CA8
> X-Postfix-Sender: rfc822; auserdmsware.com
> Arrival-Date: Wed, 27 Jun 2007 16:25:10 +0200 (CEST)
>
> Final-Recipient: rfc822; remote.usernonexistentdomain.it
> Original-Recipient: rfc822; remote.usernonexistentdomain.it
> Action: failed
> Status: 4.4.4
> Diagnostic-Code: X-Postfix; Host or domain name not found. Name service
> error
> for name=nonexistentdomain.it type=A: Host not found

The mail was bounced after Postfix received a temporary error for
several days. You didn't set delay_warning_time, so no delay warning
was issued:

The default is:
# postconf -d delay_warning_time
delay_warning_time = 0h

> maps_rbl_domains = relays.ordb.org, sbl-xbl.spamhaus.org, dnsbl.sorbs.net
Deprectaed syntax, relays.ordb.org is *DEAD*

> unknown_local_recipient_reject_code = 450
Why? Use 550!

> relay_domains = $mydestination
Don't list mydestination as relay_domains!

> smtpd_delay_reject = yes
Default anyway.

> smtpd_sender_restrictions = permit_mynetworks, permit_sasl_authenticated
Not needed (sice you have it in smtpd_recipient_restrictions)

--
Ralf Hildebrandt (Ralf.Hildebrandtcharite.de) plonkcharite.de
Postfix - Einrichtung, Betrieb und Wartung Tel. +49 (0)30-450 570-155
http://www.arschkrebs.de
When you're having a really bad day and it seems like people are
trying to piss you off, remember it takes 42 muscles to frown and only
4 to extend your middle finger.

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