Simple contract letters, updates in a glance, SMTP, etc. protocol a simple, yet important and fundamental for the transfer of email. This term it goes to work when compared to other protocols, email, previous, very simple operation. SMTP only to the user name and the domain needs to direct the message to the recipient routing. SMTP is a protocol to send and to get fit. for this reason, to get the mail instead of SMTP from the protocol, get the email, like IMAP and 3 used.