[Postfixbuch-users] Unterschiedliche Reject-Codes bei gleicher Ursache?

[Gregor Hermens]

Hallo Liste,

ich verwende Postfix 2.1.5 aus Debian Testing.

In /etc/postfix/main.cf steht:
...
unknown_address_reject_code = 550
unknown_client_reject_code = 550
unknown_hostname_reject_code = 550
unknown_local_recipient_reject_code = 550
unknown_virtual_alias_reject_code = 550
unknown_virtual_mailbox_reject_code = 550
...
smtpd_recipient_restrictions =
    reject_non_fqdn_sender
    reject_non_fqdn_recipient
    reject_unknown_sender_domain
    reject_unknown_recipient_domain
    reject_unauth_pipelining
    permit_mynetworks
    permit_sasl_authenticated
    check_client_access hash:/var/lib/pop-before-smtp/hosts
    reject_unauth_destination
    reject_unlisted_recipient
    check_sender_access hash:/etc/postfix/access # bekannte Würmer ablehnen
    check_helo_access mysql:/etc/postfix/helo_access.mysql # eigene Domains 
als HELO ablehnen
    check_helo_access hash:/etc/postfix/helo_access # eigene IPs als HELO 
ablehnen
    check_recipient_access mysql:/etc/postfix/restriction_classes.mysql # 
individuelle restriction_classes
    check_client_access pcre:/etc/postfix/du_greylisting # Greylisting für 
offensichtliche Dialups
    permit
...

(Die zeilenumbrüche in den Kommentaren stammen natürlich erst vom 
Mailprogramm.)

Trotz der *_reject_code-Einstellungen finde ich in meinen Logs z.B.:

Feb  4 06:09:08 alpha postfix/smtpd[24378]: NOQUEUE: reject: RCPT from 
unknown[220.124.10.165]: 550 <maurafitzpatrickwv at st-himik.mccme.ru>: Sender 
address rejected: Domain not found; 
from=<maurafitzpatrickwv at st-himik.mccme.ru> to=<[user1 at example.com]> 
proto=ESMTP helo=<whatodo.ru>
...
Feb  4 09:18:09 alpha postfix/smtpd[31102]: NOQUEUE: reject: RCPT from 
unknown[218.159.147.10]: 550 <ieqsjpas at doramail.comE>: Sender address 
rejected: Domain not found; from=<ieqsjpas at doramail.comE> 
to=<[user2 at example.org]> proto=SMTP helo=<[MEINE_IP]>
...
Feb  4 09:49:08 alpha postfix/smtpd[31877]: NOQUEUE: reject: RCPT from 
moutng.kundenserver.de[212.227.126.171]: 450 <sales at superack.com>: Sender 
address rejected: Domain not found; from=<sales at superack.com> 
to=<[user3 at example.net]> proto=ESMTP helo=<moutng.kundenserver.de>
...
Feb  4 10:07:38 alpha postfix/smtpd[645]: NOQUEUE: reject: RCPT from 
moutng.kundenserver.de[212.227.126.171]: 450 <sales at goherbs.net>: Sender 
address rejected: Domain not found; from=<sales at goherbs.net> 
to=<[user3 at example.net]> proto=ESMTP helo=<moutng.kundenserver.de>

Mit der gleichen Begründung "Sender address rejected: Domain not found;" wird 
also manchmal mit Code 550, meist aber mit Code 450 abgelehnt. Wie kann das 
passieren?

Gruß,
Gregor
-- 
    @mazing.de         fon +49 8142 6528665
  Gregor Hermens       fax +49 8142 6528669
Brucker Strasse 12  gregor.hermens at a-mazing.de
D-82216 Gernlinden    http://www.a-mazing.de/