SMTP Mail Protocol

Protocol Description

The Simple Mail Transfer Protocol (SMTP) is used for sending e-mail messages.

Full Name

Simple Mail Transfer Protocol

Abbreviation

SMTP

ProTips

Keep an eye on the size and number of SMTP connections going through your network. If you see a spike in traffic, it could be spam or virus traffic from a malware infected system on your network.

Known Ports

  • TCP 25 - SMTP mail port.
  • TCP 465 - Secure SMTP mail port.
  • TCP 587 - SMTP mail message submission port.

Category

Mail

External Resources

Related Protocols

A list of related protocols is below. List of all protocols.
Category Name

Mail

IMAP Mail Details

Mail

Lotus Notes Details

Mail

POP Mail Details

Mail

Secure POP Mail Details

Mail

Secure SMTP Mail Details

Mail

Secure IMAP Mail Details

Protocol Detection

Do you know how much SMTP Mail traffic flows through your network? Netify's protocol detection engine and reporting provides insights to help manage your network.

What gets measured, gets managed.

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