NET 4000 Chapter Notes - Chapter 9.6.3: Internet Assigned Numbers Authority, Internet Engineering Task Force, Internet Message Access Protocol
Document Summary
A mail transfer agent (mta) sends messages between users on a local system or over the internet. Receive mail from a mail user agent (mua) using the simple mail transfer protocol (smtp). An mua is an email application, such as mozilla. Send and receive messages to and from other mtas using smtp. Common smtp ports include ports 25, 587, or 2525. Secure smtp (ssl/tls) uses ports 465, 587, or 2526. Because port 465 was never recognized by the internet engineering task force (ietf) as an official port for smtp, the internet assigned numbers authority (iana) assigned port 465 to smtps (simple mail transfer protocol). However, smtps has been deprecated as a method for securing smtp, but port. 465 can still be used for smtp with ssl. Deliver messages to muas using the post office protocol 3 (pop3) or the internet message access protocol (imap). Can download the entire message or only the message header.
