I use Mail::Sendmail on Linux, Win2k, NT and Win98. It's easy and works fine. It requires an SMTP server to actually send the mail, but on a Unix or Win2k box, you can use the one that comes with the machine. BTW, I'm pretty sure Mail::Sendmail is unrelated to the SendMail.pm module you mention, since they have different authors. You can find Mail::Sendmail on CPAN.

Good Luck...