> high load
The usual approach to dealing with high server load for mail systems
is to split up the outbound load to a second system (or perhaps to
multiple other systems), breaking up the responsibilty for addressing
mail and doing final delivery to different systems.
This involves e.g. configuring your mail system on the relay machine
to attempt delivery to a second system nearby, which would attempt
to make the final delivery and queue if it's incapable of doing so.
The usual reason for high loads on mail systems is long mail queues,
lots of sendmail processes running trying to deliver mail to systems
which are not there. If you can possibly move the queues off to
a separate machine from the one that ahndles addressing, you'll be
better off.
(Not so fond memories of gatewaying an IBM mainframe's worth of mail
all through a 9600 baud link to a Vax omitted...)
--Ed
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