What is SMTP?

SMTP stands for Simple Mail Transfer Protocol, a protocol for sending email messages between servers. Most email systems that send mail over the Internet use SMTP to send messages from one server to another; the messages can then be retrieved with an email client using an email download protocol (usually either POP3).

In addition, SMTP is generally used to send messages from a mail client to a mail server. This is why you need to specify both the incoming mail (POP3) server and the SMTP server when you configure your email application.

SMTP operates on port 25 and 587 (as some ISPs block port 25). Fast-name's SMTP servers require authentication via SMTP AUTH, and do not support SSL/TLS.

  • 121 Users Found This Useful
Was this answer helpful?

Related Articles

Is there a size limit for email sent to my account?

There is a limit of 30MB for attachments for emails sent to your mailbox, should attachments...

What is a POP or POP3 box?

POP (or POP3) is an early email protocol used to access mailboxes. It's very simple and remains...

What is an autoresponder?

This feature allows an email address on your account to automatically respond with a specific...

How can I see email addresses on my email distribution list?

To view, add, amend or remove email addresses from your distribution lists simply log into your...

Can I use my own SMTP server?

Yes, just ask your SMTP server provider for connection details. Some ISPs may only allow you to...