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Port 993: IMAPS (IMAP over SSL/TLS)

Port 993 is the secure, TLS-encrypted standard for IMAP email retrieval.

Protocol
TCP
Category
Secure Email
Common Services
Dovecot, Courier

What is Port 993 and How Does It Work?

Port 993 is the secure, TLS-encrypted standard for IMAP email retrieval.

Security Vulnerabilities & Attack Vectors on Port 993

Provides strong cryptographic protection for mail access and user credentials.

Auditing & Scanning Port 993 with Nmap

Run the following command to check if Port 993 is reachable and determine service fingerprints:

nmap -p 993 -sV --script ssl-cert

Frequently Asked Questions

How do I check if Port 993 is open?
Use cyber-tool.org diagnostic tools or run 'nc -zv 993' in your terminal to verify open socket connections.
Is it safe to leave Port 993 open to the internet?
Exposing Port 993 (IMAPS (IMAP over SSL/TLS)) publicly introduces potential exposure. Protect it with IP whitelisting, firewalls, and encryption.