:406
(TCP/UDP)
Low Risk
IMSP
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TCP/UDP — Email
Port Overview
Port Number
406
Service Name
IMSP
Transport Protocol
TCP/UDP
Category
Email
Security Risk
Low
Port Range
Well-Known (0-1023)
What is Port 406?
Interactive Mail Support Protocol. An extension to IMAP for managing personal mail configuration such as address books and filters.
TCP/UDP
Email
Security Considerations
Port 406 (IMSP) is classified as low risk. This service uses encryption or has a minimal attack surface, making it relatively safe to expose.
Recommendation: Standard security practices apply. Keep software updated and monitor access.