Dunno about those two modules (they may be the solution, I
didn't look that far1), but the second answer
on that node
is not helpful, since it assumes you are on a UNIX machine,
and this poster specifically stated he was on a Windows
machine.
1 I gotta bail from work now, maybe I'll
get to it tomorrow, or someone else will have the answer
by then.... sorry for the lack of research.
UPDATE: Thanks, Adam, for posting your results quicker
than I could get back to this.
Net::SMTP would be a lowest-common-denominator approach, as this is an implementation of the raw SMTP protocol in Perl. It does not rely on an external program to deliver the mail.
There is also (as mentioned in the post I referenced) Mail::Mailer, which is an attempt to make the process of e-mailing totally generic across operating systems and methods. If you're under Unix, telling Mail::Mailer to use 'mail' or 'sendmail' will use the appropriate commands to deliver the mail via the standard system mail delivery mechanism. Telling it to use 'smtp' is equivalent to making it use Net::SMTP. Aside from that the interface is standard and generic.
There's also Mail::Sender (abstracted, yet redundant with Net::SMTP), Mail::Sendmail and Mail::Send. Perhaps others. A simple search against CPAN for mail pulls up a lot. Most of these bill themselves as being platform-independent.
Additionally, the node I referenced was a standard Q&A node. If you don't feel it adequately addresses the question in its entirety (meaning we can refer to it as I did for similar questions that appear here), by all means add your own response to it.. Better to keep these things under an existing categorized question than to leave it incomplete and continue churning out the same stuff every time someone asks in SOPW... *shrug*