Electronic mail protocols are application layer protocols. Mail servers use SMTP to send and receive mail messages. User-level client mail applications use SMTP for sending messages to a mail server for relaying and use another protocol to receive messages: POP, IMAP or a proprietary system such as Microsoft Exchange or Lotus Notes/Domino. Electronic mail protocols are often combined with cryptographic protocols. Information related to such protocols (IMAPS, STARTTLS etc.) should also be submitted to this category.
A brief summary of POP3, SMTP, and IMAP, including pointers to sources and frequently-asked-questions sites.
The user+box@host addressing FAQ. A discussion of what exactly is permissible and verifiable in an e-mail address.
Information about IMC and its members, all the Internet mail standards, and links to several IMC-hosted mailing lists.
Provides background and compares the Post Office Protocol (POP) with the Internet Message Access Protocol (IMAP).
comp.mail.mime meta-FAQ: Help for MIME problems. Pointers to information about Multipurpose Internet Mail Extensions and some answers to common problems with MIME.
An example of email statistics collection relying on IMAP protocol - by Switzernet.com
Online service to check if an email address follows the syntax laid down in RFC822.
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