Working SMTP in command line (telnet)

For those who know how telnet works, this guide is for you, in order to "learn" somethings about SMTP servers and how they do work.
This guide is currently avaialble only in Greek Language.
http://www.pcw.gr/default.php?pid=37&redirect=viewtopic.php?t=5546
For English language you can always refer to the RFC821.
http://www.faqs.org/rfcs/rfc821.html
As well, in english
http://www.the-welters.com/professional/smtp.html
http://www.cs.cf.ac.uk/Dave/PERL/node175.html
On the other hand, for you interested in POP3 Command Line, have a look here....http://www.faqs.org/rfcs/rfc1725.html
and here http://www.vivtek.com/pop.html

Regards
Monaxoss GR- 2007