Port 993 — IMAPS
Quick reference for TCP/UDP port 993, used by IMAPS. Includes what the service does, security guidance and related ports.
Port
993
Protocol
TCP
Service
IMAPS
What is port 993?
IMAP over TLS.
What port does IMAPS use?
IMAPS listens on port 993 by default.
Security guidance
Low risk — designed for public exposure
Port 993 (IMAPS) is designed for public exposure. Standard hardening (TLS certs, current firmware, sensible rate limits) is enough — no special isolation needed.
Related ports
Frequently asked
What is port 993 used for?+
Port 993 is the standard TCP/UDP port for IMAPS. IMAP over TLS.
What port does IMAPS use?+
IMAPS listens on port 993 by default.
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