[CentOS] clustered mail server?
Christopher Chan
christopher at ias.com.hk
Sun May 18 06:31:42 UTC 2008
>> No, mail spools/queues do not need replication. Stuff in the queue are
>> usually deleted in a second and such dynamic change is not worth
>> replicating. If you do put the queue on a distributed filesystem, in
>> most cases you cannot have more than one instance running save for
>> sendmail.
>>
>
> outbound mail can sit in queues retrying for hours negotiating their way
> into the greylists of the likes of Yahoo. I guess if you don't mind
> the possibility of messages getting lost around a server failure event,
> then its no big deal, for sure.
>
That only leaves putting the queue on a distributed filesystem.
Replication will not be a complete solution to that and qmail queues
cannot be replicated.
Then there is the question of whether to leave a message in the queue
for more than 4 hours given the expectation of email to be more or less
instantaneous.
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