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Re: [NETVAERK] Fosøg på relay???



Peter Makholm skrev:
"bf" <sslug@sslug> writes:

Jeg omrokerer lige lidt:

May 14 06:19:42 www postfix/smtp[11261]: 9ED50351455: to=<sslug@sslug>, relay=mail.bf-data.dk[212.242.63.177]:25, delay=6.6, delays=1/0.03/5.6/0, dsn=5.4.6, status=bounced (mail for mail.bf-data.dk loops back to myself)
May 14 06:19:43 www postfix/bounce[11264]: 9ED50351455: sender non-delivery notification: F0A7E35147C
May 14 06:19:43 www postfix/qmgr[21789]: 9ED50351455: removed

Disse tre linjer hører sammen.

Første linje siger at postfix forsøger at behandle en mail til
sslug@sslug som den forsøger at sende
videre til mail.bf-data.dk. Men det er den selv og den forsøger derfor
at bounce mailen.

May 14 06:19:43 www postfix/cleanup[11260]: F0A7E35147C: message-id=<sslug@sslug>
May 14 06:19:43 www postfix/qmgr[21789]: F0A7E35147C: from=<>, size=2745, nrcpt=1 (queue active)
May 14 06:21:52 www postfix/smtp[11265]: F0A7E35147C: to=<sslug@sslug>, relay=none, delay=129, delays=0.04/0.02/129/0, dsn=4.4.1, status=deferred (connect to mx3.mail.yahoo.co.jp[203.216.243.172]: Connection timed out)

Dette er bouncen som den forsøger at levere til mx3.mail.yahoo.co.jp, men får en timeout. Den forsøger sikkert senere, søg i din log efter F0A7E35147C.


Den første linje tyder på hvad dit problem er:

  Postfix tager imod mail til mail.bf-data.dk, men mener ikke at den
  er den endelige destination, hvorfor den sender mailen videre til
  mail.bf-data.dk, hvilket er den selv.

Så du skal have postfix til enten at afvise mail til mail.bf-data.dk
eller også til at vide at den er den endelige modtager for disse mail.

Alt kontakten *til* yahoo.co.jp er sikkert bare bounces af
ovenstående.

Det ligner rigtigt meget det man kalder backscatter. Altså at bounces til ikke eksisterende mailadresser bliver sendt til den fakede afsender adresse. Det er der manger der synes er lige så irriterende som et åbent relay.


Et godt bud er (Vi har ikke set din postconf -n output), at du mangler noget "reject_unauth_destination" i dine smtpd_recipient_restrictions. Du kan også bruge reject_unverified_recipient, hvis det er meningen din server skal relaye mail for et domæne til en anden postserver.

Mvh. Jesper



 
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