What is IMAP4 protocol?

What is IMAP4 protocol?

(Internet Message Access Protocol 4) A programming interface (API) from the IETF that enables a user’s email program to access the mail server (RFC 3501 standard). Email clients such as Outlook, Mail, Eudora and Thunderbird are typically configured to retrieve mail either via IMAP4 or POP3, the other popular standard.

What is RFC SMTP?

Klensin Standards Track [Page 7] RFC 5321 SMTP October 2008 The means by which an SMTP client, once it has determined a target domain, determines the identity of an SMTP server to which a copy of a message is to be transferred, and then performs that transfer, is covered by this document.

What is SMTP 25 used for?

Port 25: SMTP port 25 continues to be used primarily for SMTP relaying. SMTP relaying is the transmission of email from email server to email server. In most cases, modern SMTP email clients (Microsoft Outlook, Mail, Thunderbird, etc.)

Is IMAP the same as IMAP4?

IMAP4 is the latest version of the enhanced IMAP standard. Emails downloaded by a client using the POP3 protocol are also deleted from the server when they are deleted in the mailbox. However, when e-mails downloaded with IMAP4 are deleted from the mailbox, they are not deleted from the mail server.

What is POP3 and IMAP4?

POP3 is an abbreviation for Post Office Protocol 3. IMAP is an abbreviation for Internet Message Access Protocol. Introduction. The POP is an Internet standard protocol on the application layer that the local email clients use for retrieving emails from any remote server over the TCP/IP connection.

Is POP protocol based on RFC?

The POP family has a long and checkered history. Although primarily a minor revision to RFC 1460, POP3 is based on the ideas presented in RFCs 918, 937, and 1081.

What is an SMTP protocol?

An email protocol is a set of rules that help you exchange information between email accounts. While there are several different protocols in place today, SMTP is one of the most widely used outgoing email protocols. How Does SMTP Work?

What are the limitations of original SMTP?

Original SMTP supports email addresses composed of ASCII characters only, which is inconvenient for users whose native script is not Latin based, or who use diacritic not in the ASCII character set. This limitation was alleviated via extensions enabling UTF-8 in address names.

How did SMTP start?

As more computers were interconnected, especially in the U.S. Government’s ARPANET, standards were developed to permit exchange of messages between different operating systems. SMTP grew out of these standards developed during the 1970s.

Can SMTP be used by users outside the ISP’s network?

Under this system, an ISP ‘s SMTP server will not allow access by users who are outside the ISP’s network. More precisely, the server may only allow access to users with an IP address provided by the ISP, which is equivalent to requiring that they are connected to the Internet using that same ISP.