Description:

Mail::Bulkmail gives a fairly complete set of tools for managing
mass-mailing lists. I initially wrote it because the tools I was using
at the time were just too damn slow for mailing out to thousands of
recipients. I keep working on it because it's reasonably popular and I
enjoy it.

In a nutshell, it allows you to rapidly transmit a message to a mailing
list by zipping out the information to them via an SMTP relay (your own,
of course). Subclasses provide the ability to use mail merges, dynamic
messages, and anything else you can think of.