Chris Wilson <chris+exim@???> (Mi 16 Jun 2010 09:53:41 CEST): > Hi Tilo,
>
> On Tue, 15 Jun 2010, Dr. Tilo Levante wrote:
>
> > we have the following log entry about the backup MX:
> >
> > 450 4.1.0 Don't use the Backup MX 'relay.rzone.de' while the Primary MX
> > is available - please send your mail to ...
> >
> > Does exim use the Backup MX if the primary MX is available? Can I
> > configure exim to prefer the primary MX?
>
> Exim should try the primary first, as any MTA should. Sometimes it may
> fail to reach the primary, and fall back to the secondary, particularly if
> the primary uses greylisting. The secondary is tempfailing the mail,
> because *it* thinks the primary is still up, which causes exim to try the
> primary again later. Seems fairly normal and OK to me.
But it's quite stupid by second mx, to think that my (network)
connectivity to the second mx is the same as to the first mx.
