[arch-general] Sigurd rDNS broken

[Florian Pritz]

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Pierre Schmitz wrote:
> Am Sonntag 09 August 2009 12:29:03 schrieb Pierre Schmitz:
>> Am Sonntag 09 August 2009 12:24:35 schrieb Florian Pritz:
>> > I just noticed sigurd.archlinux.org has a broken rDNS so my mailserver
>> > rejects all mails coming from the AUR.
>>
>> Looks like your mail server is broken. An IP can have several hostnames.
> 
> Could you explain what you are using to filter emails? If you really check if 
> the ehlo domain/ip is the same as the rdns you might get very few emails. ;-)
> 
I check if the HELO looks valid (haven't yet had problems with that) and
 if IP -> hostname -> IP == IP that wants to send the mail.
This should work with most valid mailserver.

Also see http://en.wikipedia.org/wiki/Forward_Confirmed_reverse_DNS
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