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From: Wietse Venema (wietseporcupine.org)
Date: Fri Apr 06 2001 - 17:22:13 CDT
> An anyone help me with this ?
> Thanks for your help. But there is still concern if postfix will select the
> other MX for this domain at all and deliver to them. Does postfix query the
> other MX for the domain. Do you know of any other way to do the load
> balancing with postfix.
Postfix sorts MX records by preference, and then tries them in
order. With records having the same preference, the result depends
on the order in which the name server sent the information.
> Irfan Akber
> -----Original Message-----
> From: Ralf Hildebrandt [mailto:Ralf.Hildebrandtinnominate.com]
> Sent: Friday, April 06, 2001 3:28 PM
> To: Irfan Akber
> Subject: Re: relayhost = $mydomain
> On Fri, Apr 06, 2001 at 03:16:43PM -0400, Irfan Akber wrote:
> > Ok I ran the script and it works.
> > I also tried making all the entries to "n"
> > and that works too.
> >But when I setup 2 MX records with the same preference
> > "10" it only goes to one box and not to the other ?
> Yes, postfix then selects one randomly (according to RFC).
> > I want that postfix
> > should send to 3 mail servers for the domain with the same preference to
> > load balancing.
> Well, just do that. I don't know exactly if the resolver library or Postfix
> itself does the "shuffling" of the records of same preference, but your
> is the way to go.
> Please take that back to the list!
> ralf.hildebrandtinnominate.com innominate AG
> System Engineer Don't be afraid of what you see -
> Diplom-Informatiker be afraid of what you don't see!
> tel: +49.(0)7000.POSTFIX fax: +49.(0)30.308806-698
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