IMAP Mail Protocol

Detection Information

The following page provides information on the IMAP Mail Protocol.

Protocol Description

The Internet Message Access Protocol (IMAP) protocol is used by e-mail clients to synchronize mail from a remote server. The more secure IMAPS protocol is more widely deployed, but IMAP is still in use.

Full Name

Internet Message Access Protocol



Best Practices

IMAP can be both encrypted (via STARTTLS) and unencrypted, so there is a risk that usernames and passwords are sent across the network in an insecure manner. You might want to consider using the alternative IMAPS protocol to guarantee encryption.

Port Statistics

IP Protocol Flow Percent
TCP 143 100%

Port Reference - RFC

  • TCP 143 - Internet Message Access Protocol



External Resources

Protocol Detection

Do you know how much IMAP 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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Related Protocols

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


SMTP Mail smtp-mail Details


Secure SMTP Mail smtps Details


Secure POP Mail pops Details


POP Mail pop-mail Details


Lotus Notes lotus-notes Details


Secure IMAP Mail imaps Details

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