Knaupp, Thomas wrote:
> | 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 ...
>
> Maybe I found the solution myself ..
>
> Could be
> ignore_target_hosts server1 server2
> the right thing ?
That doesn't sound right. Neither of your pair
of secondaries should forward to another MX which
is of the same priority, assuming the usual sort
of configuration. What router was actually being
used for this forwarding, and what is *that system's*
view of the DNS? Are the addresses really in
Net 10? Can you run a test mail through in debug mode?
Please don't obfuscate. It makes it harder for anyone
to help you.
Cheers,
Jeremy
