143
IMAP
Medium RiskTCP — Email
Port Overview
Port Number
143
Service Name
IMAP
Transport Protocol
TCP
Category
Email
Security Risk
Medium
Port Range
Well-Known (0-1023)
What is Port 143?
Internet Message Access Protocol. Retrieves and manages email on a mail server, keeping messages on the server for access from multiple devices. Supports folders and search.
TCP
Email
Commonly Used
Security Considerations
Port 143 (IMAP) is classified as medium risk. While this service is commonly exposed, consider using encrypted alternatives where available.
Recommendation: Keep the service updated. Monitor logs for unusual activity.