arduino as SMTP server

Hello, do anybody tried to create SMTP or ESMTP server (MTA) on Arduino, to open possibility send emails directly to arduino?

Interesting project to make the arduino a SMTP server;

startpoint: http://www.ietf.org/rfc/rfc2821.txt http://www.samlogic.net/articles/smtp.htm

Maybe it is easier to make a POP client for the arduino and give it a gmail account. Mails would be buffered in the google server until Arduino has time to process next one.

startpoint: http://datatracker.ietf.org/doc/rfc1939/