Re: [Exim] Exim for 6M users?

On Thursday, Mar 13, 2003, at 08:18 US/Mountain, Konrad Michels wrote:

> Afternoon folks!
> Just been asked by my CTO to prepare some guidlines for a mail system
> to
> cope with 6 million users, capable of coping with 2 million
> simultaneous
> users without blinking too hard.
>
> My initial thoughts are along the lines of splitting the MTA function
> into:
> 1. incoming mail
> 2. mailstore
> 3. outgoing spool
> 4. pop3 access
>
> All the above would live on separate machines/clusters of machines.
>
> Any comments? I know someone on the list had a white paper on a
> similar
> scenario done with Exim 3.x - if that person would let me know again
> where it is I'd be most appreciative!
>
>

I wish I had this problem :-)

When splitting the mail store off from the incoming and outgoing
processors, consider using maildir format, as that handles nfs
mailstores pretty well without collisions. courier-imap is an impp
and/or pop3 server that works with maildir format, and exim is happy to
drop stuff into maildirs...

best
Chad