Port
Port 993 — IMAPS
Port 993 (TCP) is used by IMAPS. IMAP over TLS — encrypted email access.
Port 993 at a glance
| Property | Value |
|---|---|
| Port number | 993 |
| Transport | TCP |
| Service | IMAPS |
| Category | Well-known port |
What it is used for
IMAP over TLS — encrypted email access.
Security considerations
Secure; preferred over plain IMAP (143).
See our full TCP/UDP port reference and learn how firewalls filter ports in the CyberOps course.
Frequently asked questions
What is port 993 used for?
Port 993 (TCP) is used by IMAPS. IMAP over TLS — encrypted email access.
Is port 993 TCP or UDP?
Port 993 uses TCP.
Is it safe to open port 993?
Secure; preferred over plain IMAP (143).
Related
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