POP Mail Protocol

Detection Information

The following page provides information on the POP Mail Protocol.

Protocol Description

The Post Office Protocol (POP) is a protocol used by e-mail clients to retrieve mail from a remote server. The IMAP mail protocol is much more prevalent these days, but the protocol is still in use.

Full Name

Post Office Protocol



Best Practices

POP 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 POP3S protocol to guarantee encryption.

Port Statistics

IP Protocol Flow Percent
TCP 110 100%

Port Reference - RFC

  • TCP 110 - Post Office Protocol - Version 3



External Resources

Protocol Detection

Do you know how much POP 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.

Learn More

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


IMAP Mail imap-mail Details


Lotus Notes lotus-notes Details


Secure IMAP Mail imaps Details

Integration and Custom Solutions

Do you have any questions about integration, APIs or custom development?

Contact Us