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Implicit TLS-encrypted Internet Message Access Protocol for secure email synchronization across devices.
Verify whether Port 993 is open, closed, or filtered on your server or public IP address.
Port 993 is the secure, encrypted counterpart to standard IMAP (port 143). Connections to port 993 initiate an immediate TLS handshake before issuing any IMAP protocol commands, ensuring that usernames, passwords, folder hierarchies, and email contents are shielded from network eavesdroppers.
Enforce modern TLS versions (TLS 1.2 or 1.3) and maintain valid SSL certificates signed by recognized Certificate Authorities.
Technical answers and configuration advice for Port 993.
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