Wietse Venema via Postfix-users:
> Doug Hardie via Postfix-users:
> > I used Viktor's collate to trace a specific email handling. There were a
> > number of these entries. However, I am only showing 2 of them:
> >
>
> This is host mx01.t-online.de[194.25.134.72]:
>
> > Feb 10 03:15:40 mail postfix/smtp[60428]: 4TWjVT5qz7z2gF8w:
> > to=<us.ash...@t-online.de>,
> > orig_to=<SRS0=YPr1=JS=t-online.de=us.ash...@lafn.org>,
> > relay=mx01.t-online.de[194.25.134.72]:25, delay=59371,
> > delays=59369/0.02/1.5/0, dsn=4.0.0, status=deferred (host
> > mx01.t-online.de[194.25.134.72] refused to talk to me: 554
> > IP=47.181.130.121 - None/bad reputation. Ask your postmaster for
> > help or to contact t...@rx.t-online.de for reset. (NOWL))
>
> With "smtp_skip_5xx_greeting = yes" (the default) Postfix
> will skip to an alternate MX address.
Oh, and it is Postfix that does the remapping to dsn=4.0.0.
Wietse
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