E-mail reference information

You can find reference information about mail server journal entries, Simple Mail Transfer Protocol (SMTP) commands, and Post Office Protocol (POP) verbs and parameters.

Mail server journal entries
Use this information to help you understand the codes and messages used in journal entries.
Simple Mail Transfer Protocol
Simple Mail Transfer Protocol (SMTP) is a TCP/IP protocol used in sending and receiving e-mail. It is typically used with POP3 or Internet Message Access Protocol to save messages in a server mailbox and download them periodically from the server for the user.
Post Office Protocol
The Post Office Protocol (POP) Version 3 mail interface is defined in Request for Comments (RFC) 1939 (POP3), RFC 2449 (POP3 Extension Mechanism), and RFC 2595 (Using TLS with IMAP, POP3, and ACAP). RFC is the mechanism used to define evolving Internet standards.

Parent topic: E-mail