Types Of E-mail Protocols

Simple Mail Transport Protocol (SMTP)
Definition
The Simple Mail Transfer Protocol (SMTP) is the on the whole widely used protocol to send off messages by Message Transfer Agents (MTA) on the Internet. The protocol is defined in the RFC 821 and RFC 1123, and was designed to move mail independently of whichever particular transmission subsystem.
Usage
Simple Mail Transport Protocol (SMTP) is the standard enrapture protocol on behalf of transport messages from single MTA to a new MTA above the Internet. Using MIME encoding, it enables the move of text, cartridge, multimedia, images, and audio attachments.

Multi-purpose Internet Mail Extensions (MIME)
Definition
The Multipurpose Internet Mail Extension (MIME) protocol was residential to delimit a method of sad binary library through existing e-mail gateways. The default protocol on behalf of standard text messages is defined in RFC 822, and is widely used on the Internet. These messages are sent via the de facto mail move protocol, SMTP, defined in RFC 821.
Usage
Multi-purpose Internet Mail Extensions (MIME), a SMTP message construct, is the standard specification on behalf of the attachment of binary library.

Post Office Protocol 3 (POP3)
Definition
The Post Office Protocol, version 3 (POP3) is a commonly used protocol on behalf of retrieving e-mail messages on the Internet. POP3 is a standard client-server protocol on behalf of receiving emails. The technical specifications can be found in RFC 1225. Because POP3 transmits tidy text passwords, it is leisurely being superceded by IMAP4.
Usage
The Post Office Protocol, version 3 (POP3) is a commonly used protocol on behalf of retrieving e-mail messages on the Internet. POP3 is a standard client-server protocol on behalf of receiving e-mails. POP3 is superlative suited to someone who no more than forever needs to access their email from their own workstation.

Internet Message Access Protocol 4 (IMAP4)
Definition
The Internet Message Access Protocol 4 (IMAP4) was designed as a superset of POP3, and enhances both message retrieval and management as well as resolves many of the limitations of POP3 (e.G., password protection). The heart IMAP specification is defined in RFC 2060.
Usage
Internet Message Access Protocol version 4 (IMAP4) is the standard protocol on behalf of access to e-mail servers. IMAP4 is on the whole suited to inhabitants who would like to access their e-mail from several locations, e.G. By the side of their function and from a PC by the side of home-based. IMAP4 provides users the option of storing and manipulating messages on the mail head waiter, which is crucial on behalf of job functions so as to require the user to access mail from several separate clients.