[Postfixbuch-users] reverse lookup und greylisting

[thomas polnik]

Hallo,

> 'n Kollege fragte mich gerade, ob der denn theoretisch zu seiner
> festen IP-Adresse mehrere Namen auflösen könnte.
>
>
könnte zu Problemen führen, siehe
<http://www.mailinglistarchive.com/postfix-users@postfix.org/msg41029.html> 
Da hatte jemand 260 PTRs für eine IP.

Zitat:
"Actually, Postfix does not look up the PTR records. These lookups

happen below the getnameinfo() system library routine.  Then Postfix
examines only the first name that pops out: if the name resolves
to the client IP address, then use it, otherwise, don't use it.

In other words Postfix won't try all permutations of reverse and
forward lookup results to decide which of many names it should use.

Wietse
"


Grüße,
thomas polnik.