Distributed setup with realtime failover/balancing

[Richard Frovarp]

jonas at vrt.dk wrote:
>> This is over kill!
>>
>> For inbound email:
>>
>> 	mydomain.com IN MX 5 my.mail.server.mydomain.com
>>
>>
>> 	my.mail.server.mydomain.com 2 IN A 1.2.3.4
>> 	my.mail.server.mydomain.com 2 IN A 1.2.3.5
>>
>> This works fine - causes the load balancing to be done a protocol level
>> and in the event of a failure will automatically failover to the other
>> box.  Worse case scenario is badly configured remote servers will wait
>> for "retry interval" minutes before delivering to the other server.
>>
>>
>>     
> Hmm well it might be overkill, but definitely not for the above reason. Your
> describing the normal basic smtp loadbalancing/failover that mx records
> provides, which is fine. The problem is in a mailscanner/mailwatch setup
> there are more components than simply the smtp incbound traffic. After a
> remote server have send a mail to either of the mx records, the mail is
> stored temporary on one of the boxes, if that box goes down, that mail and
> any mail quarantined on the box is unavailable to users. Which is not
> acceptable.
>
> Best regards
> Jonas Larsen
>
>   
I take it you are going to be running two Ultra Monkey servers as well then?