[volunteers] System was near RAM exhaustion

[Rick Moen]

Quoting Vasudevan Kottilil (vasudevank2 at gmail.com):

> Please advice where to start - the only mail related task I have done before
> is installing and configuring sendmail as part of RHCE training.

Best starting point:  Read the documentation for EximConfig,
http://www.jcdigita.com/eximconfig/ .

It's a drop-in set of Exim configuration snippets, Exim ACLs (rulesets),
and Exim extensions for antispam purposes -- designed to be used with
Exim4.x and Marc Merlin's SA-Exim software.