By the way, you might want to rephrase your question-- it's not very clear (in fact, it's sort of meaningless) to say that you want to "send an email to perl". That just doesn't mean anything.

What you want to do, as far as I can tell, is to have all incoming email messages handled by a Perl script. So, for example, if I set up a Perl script to handle my mail, all incoming mail would be piped to that Perl script, and it could do whatever it wished with the contents of the messages.

You might want to take a look at Mark-Jason Dominus's My Life with Spam series. Part One is up on his site, but I can't seem to get to plover.com, so it's also on LinuxPlanet; Part Two and Part Three are both up on perl.com. The articles deal with filtering spam from your mail, but you may be able to get something useful out of them. Here's a part that deals specifically with how the mail message gets into your program.