Acronym: Simple Mail Transfer Protocol
The de facto standard for e-mail transmission across the internet. It is a relatively simple, text-based protocol, where one or more recipients of a message are specified (and in most cases verified to exist) and then the message text is transferred. It is quite easy to test a SMTP server using the telnet program.
SMTP uses TCP port 25. (From Wikipedia SMTP (http://www.wikipedia.org/wiki/SMTP))
Related Topics
(Adaption from Wikipedia is FDL licensed)
TakeDown.NET -> “SMTP”