sendmail's outgoing IPs

[perryh at pluto.rain.com]

> i have 3 different links to ISP all are ADSL's so outgoing
> bandwidth is low, i would like to spread the load generated
> by outgoing mails.

Pardon my lack of imagination, but how could anyone -- other
than a spammer -- be generating enough outbound email traffic
to *need* to load-balance it, and yet have little enough
total Internet traffic to be using DSL rather than something
oriented to commercial use (like a T1)?