[exim] Mail automatically generated

I'm using exim4 ver.4.74 as MTA in an Ubuntu Server 11.04 to serve 10
users, with good level of service,
with courier-imap server ver 4.8.0, clamav ver 0.97, SpamAssassin ver
.3.3.1 with razor, pyzor and sa-exim 4.2.1

This system, also receives mails automatically fron a local (on the same
LAN) server: the mails are used to alert end users
about the status of their application. These automatic mails, are
generated much faster that "human" mails and
i'd like to know if exim4 needs to be tuned in some way to manage this
situation, considering also that the volume
of the automatic mails is growing in the near future.

Thank You and Best Regards
luciano