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Port 143: IMAP (Internet Message Access Protocol)

IMAP manages and retrieves emails while keeping messages synchronized on the remote server across multiple devices.

Protocol
TCP
Category
Email Retrieval
Common Services
Dovecot, Microsoft Exchange

What is Port 143 and How Does It Work?

IMAP manages and retrieves emails while keeping messages synchronized on the remote server across multiple devices.

Security Vulnerabilities & Attack Vectors on Port 143

Unencrypted IMAP is vulnerable to credential theft. Always use IMAPS on port 993.

Auditing & Scanning Port 143 with Nmap

Run the following command to check if Port 143 is reachable and determine service fingerprints:

nmap -p 143 -sV

Frequently Asked Questions

How do I check if Port 143 is open?
Use cyber-tool.org diagnostic tools or run 'nc -zv 143' in your terminal to verify open socket connections.
Is it safe to leave Port 143 open to the internet?
Exposing Port 143 (IMAP (Internet Message Access Protocol)) publicly introduces potential exposure. Protect it with IP whitelisting, firewalls, and encryption.