Autore: Renaud Allard Data: To: Andrew - Supernews CC: exim-users Oggetto: Re: [exim] Fixing RDNS Instructions
Andrew - Supernews wrote: >>>>>> "Renaud" == Renaud Allard <renaud@???> writes:
>
> Renaud> You should maybe add some info about how the HELO of a
> Renaud> mailserver should be resolved.
>
> Renaud> So the best way would be HELO == A == PTR
>
> HELO == A == PTR is best _only_ if the PTR record value is not generic.
>
That should be inserted too indeed, it seemed almost trivial to me :)
> If you control the PTR record, then set it to a non-generic value
> (mail.example.com rather than ip-192-0-2-25.example.com).
>
> If you _don't_ control the PTR record, and the upstream has it set to
> a generic value, then having the HELO == A being a non-generic name is more
> important than HELO == PTR.
>
> (There are a handful of loons who will block you for HELO != PTR, but these
> are vastly outnumbered by the people who will (directly or indirectly) block
> you for HELO == generic name. A smaller number of people will block you for
> PTR == generic name, but you either have to put up with that or get control
> of your PTR records, in which case see above.)
>
> (Another myth that seems widespread is the HELO == MAIL FROM domain
> one, which is completely spurious. I would love to know how this one
> got started.)
>
