:557
(TCP/UDP)
OpenMail
Low RiskTCP/UDP — Email
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Port Overview
Port Number
557
Service Name
OpenMail
Transport Protocol
TCP/UDP
Category
Email
Security Risk
Low
Port Range
Well-Known (0-1023)
What is Port 557?
OpenMail. Protocol for HP OpenMail email and messaging system.
TCP/UDP
Email
Security Considerations
Port 557 (OpenMail) 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.