Support for secure handshake protocols, ensuring that only authenticated clients can query the mail store.
Following the principles outlined in NIST SP 800-177 Revision 1 , this specification prioritizes: US MAILACCESS.txt
Mandatory use of TLS for both SUBMISSION (port 587) and IMAPS (port 993) to protect data in transit. 3. Protocol Compatibility Support for secure handshake protocols, ensuring that only