Date: Sun, 23 Jul 1995 01:28:27 +0200 (MET DST) From: roberto@blaise.ibp.fr (Ollivier Robert) To: nc@ai.net (Network Coordinator) Cc: nate@trout.sri.MT.net, hackers@FreeBSD.org Subject: Re: MX records and sendmail Message-ID: <199507222328.BAA26114@blaise.ibp.fr> In-Reply-To: <Pine.BSF.3.91.950722163655.9901A-100000@aries.ai.net> from "Network Coordinator" at Jul 22, 95 04:41:01 pm
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> in the DNS entry, what will happen is B will freak out trying to send
> back to itself on the MX try. Site B is the best site for A, it should
> try A directly. What will happen is the mail will be held in B's queue
> until A comes back online.
Not all sendmail will react like this. This not the default behaviour
for sendmail 8.x :
# if we are the best MX host for a site, try it directly instead of config err
#O TryNullMXList
> What might work for you otherwise is:
>
> Site A MX 5 Site A
> MX 10 Site B
>
> so B will try to send the mail to A if it can. Though setting Ow to True
> works over here.
You are not conform to the RFC if you do so (even if a lot of people does
this anyway).
The double MX is somewhat cleaner.
--
Ollivier ROBERT -=- The daemon is FREE! -=- roberto@FreeBSD.ORG
FreeBSD 2.2-CURRENT #5: Fri Jul 14 12:28:04 MET DST 1995
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