Hello,
I've set up two servers that act as backup MXs for
various domains. In times when spam flood is increasing
more and more, I tried to "load balance" them ..
The MX-Records for the domains using this servers
is set round robin, i.e.
IN MX 10 realmail.customer.tld.
IN MX 20 eximbackup.domain.tld.
where
eximbackup.domain.tld. IN A 10.0.0.1 [server 1]
IN A 10.0.0.2 [server 2]
So exim does the dns lookup for sending the outgoing
mail and is (of course) querying/using all MX-Records.
So far no problem .. but if the lowest MX is down,
then the first exim server is sending the mail
to the second one and that is sending the mail back
again .. and so on ...
As a workaround I use defer hosts = server2
at the first machine and defer hosts = server1
on the second ..
Any idea how I can _completely_ avoid this
bounces without adding a manual route for a
few thousand domains ?
Kind regards,
Tom
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SCHWARZ COMPUTER SYSTEME GMBH
Altenhofweg 2a
92318 Neumarkt
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http://www.schwarz.de
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Geschaeftsfuehrer: Manfred Schwarz
Sitz der Gesellschaft: Neumarkt i.d.Opf.
Registergericht: AG Nuernberg, HRB 11908
WEEE-Reg.-Nr.: DE36950826
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