ESMTP (Extended Simple Mail Transfer Protocol)

ESMTP is an extension to the Simple Mail Transfer Protocol (SMTP) that adds support for various features that are not available in the original protocol. These features include, but are not limited to, support for various message formats (including MIME), support for various encodings (including 8-bit and binary), support for various transport mechanisms (including ESMTP and LMTP), and support for various authentication mechanisms (including CRAM-MD5 and GSSAPI).

ESMTP was originally developed by the IETF's Message Handling Services working group and was first published as a proposed standard in 1996. Since then, it has been refined and updated several times, most recently in 2006.

ESMTP is not widely used in practice, due largely to the fact that it requires all participating systems to support all of its features. In contrast, the original SMTP protocol is much simpler and thus more widely supported.

What is extended version of SMTP? The extended version of SMTP is a more recent version of the protocol that includes additional features and capabilities. These include support for internationalized email addresses, better handling of delivery status notifications, and the ability to send large attachments.

What is the use of Esmtp?

Esmtp is a protocol for sending email. It is an extension of the Simple Mail Transfer Protocol (SMTP) and defines a set of rules for how email should be formatted and transmitted. Esmtp is a widely used protocol and is supported by most email servers and clients.

Which protocol is used for extended mailing service?

There are a few different protocols that can be used for extended mailing service, but the most common is the Simple Mail Transfer Protocol (SMTP). Other protocols that can be used include the Post Office Protocol (POP) and the Internet Message Access Protocol (IMAP). What port is Esmtp? The port for Esmtp is typically 25.


The answer to this question is that SMTP is a TCP protocol. This means that when you are sending or receiving emails using SMTP, the communication between your computer and the email server is happening over a TCP connection.

UDP is another common protocol that is often used for communication on the Internet. However, UDP is not typically used for email communication because it is not as reliable as TCP.