ON Wed, Jan 09, 2002 at 10:21:38AM -0600, Jay Kline wrote: 
> I am doing some research to set up a high volume SMTP relay server for a 
> company.  As of right now, they average roughly 4000 7K messages per minute 
> during the work day (a total of about 1 million messages per 8 hour work 
> day).  By the end of the year, their estimates are to be sending 12 times 
> that.  As this is outgoing mail only, local delivery really isnt a big deal, 
> we have one incoming server set up for that, and is handling just fine.  

Can you lose messages? 

Can any of the messages be delayed for up to 24 hours? 

I imagine N Postfix FreeBSD / Linux servers with a bunch of fast SCSI disks 
and appropriate FS settings would be a good start.

-- 
Michael