[CentOS] clustered mail server?

[Christopher Chan]

Rudi Ahlers wrote:
> Karanbir Singh wrote:
>> Rudi Ahlers wrote:
>>> Well, that's one of the problems I foresee, but also the fact that 
>>> each email has a unique message ID, so I don't know if the backup 
>>> server will pickup the changed messages ID's or not? I have been 
>>> thinking of running a MySQL backed mail server, but have a feeling it 
>>> will have a heavy impact on performance
>>
>>
> I'm referring to the way qmail stores emails (if each email is a 
> different file). AFAIK, this is a known problem with clustered mails 
> servers.
> 

Maildir is in use by almost all MTAs available on Unix/Linux or can be 
supported by available LDA's such as procmail/maildrop. Keeping the mail 
store in sync with the backup server whether by rsync or instantly by 
using a distributed filesystem will solve whatever problem you are 
thinking of in this respect.