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IPFYI
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158

PCMail Server

Low Risk

TCP/UDP — Email

Port Overview

Port Number 158
Service Name PCMail Server
Transport Protocol TCP/UDP
Category Email
Security Risk Low
Port Range Well-Known (0-1023)

What is Port 158?

PCMail Server was an early distributed mail architecture protocol defined in RFC 1056. Entirely obsolete.

TCP/UDP Email

Security Considerations

Port 158 (PCMail Server) 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.

Related Ports — Email

25 SMTP 109 POP2 110 POP3 143 IMAP 174 MAILQ 209 QMTP 220 IMAP3 465 SMTPS
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