This page shows all known information about tag protocol::smtp.
Short description
SMTP
Long description
Simple Mail Transfer Protocol, a protocol for transmitting emails over the
Internet.
.
Every SMTP server utilizes SMTP to hand on emails to the next mail server
until an email arrives at its destination, from where it is usually retrieved
via POP3 or IMAP.
.
Link: http://en.wikipedia.org/wiki/Simple_Mail_Transfer_Protocol
Link: http://www.ietf.org/rfc/rfc2821.txt