What is SMTP?


"SMTP is used for sending email from one SMTP mail server  to another."

SMTP stands for Simple Mail Transfer Protocol. SMTP mail server is standard way by which clients like Outlook, Lotus, and web mail can send email to receivers.

SMTP is an internal mail protocol based on internet standards RFC 821 and RFC 5321. SMTP defines the rules and process of transferring mail content from source to destination.

SMTP can be implemented by Email providers based on the protocol standards. SMTP protocol operates over secure layer called SMTPS. SMTP is used for relaying outgoing messages to the mail server.

SMTP2Go Works

SMTP is a mail transfer mechanism that defines the sender through a structure called the envelope. SMTP does not govern the message contents like header and body itself. The envelope contains message routing information like sender, receiver address, and return path etc., SMTP uses TCP port 25 or port 587.

SMTP is a connection based protocol. SMTP commands are human readable in text format. MAIL, RCPT, DATA are examples of SMTP commands to establish return address, recipient and sending the message respectively.


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4 Responses to “What is SMTP?”

  1. anthony says:

    Nice to read your blog

    • Beran says:

      Yes, as I mentioned in the post, soinfopg is easier with software but since I’m on a shoestring budget, I gave the basic way of doing this. :)I do know that Mac OS is partly based on UNIX, which is why I have a soft corner for it. But the fact is that their market share is less than that of Linux. Note that you can’t sit down and compare the grapics of Linux with others, since it depends on your desktop environment like KDE, GNOME, WindowMaker etc.; the GUI of Windows and Mac OS is standard though so you can compare them. Personally, I prefer KDE, but tastes differ. Also, Apple’s latest decision to allow users to run Windows on Macs spells the doom for their OS, as I wrote in my earlier post.Unfortunately though, I don’t have much time now, with school and coaching classes (and retaining my title as best quizzer in the Universe), to install that wondeful Mac OS. 🙁 Sure, I’ve worked on it and I like it a lot, especially the Dashboard widgets; which frankly nobody else has been able to replicate properly (although Yahoo! Widgets comes close).

  2. […] transmission of your message. Of noteworthy importance in this process is the SMTP mail server. SMTP stands for the Simple Mail Transfer Protocol, the standardized messaging protocol used by mailing […]

  3. A number of incredibly valid details! I value you creating this article as well as the rest of the website is really good as well.

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