Mandatory use of TLS for both SUBMISSION (port 587) and IMAPS (port 993) to protect data in transit. 3. Protocol Compatibility

Support for enhanced search and mailbox management as detailed in draft-ietf-extra-imap4rev2-30 .

Known malicious sources to be summarily declined.

Following the principles outlined in NIST SP 800-177 Revision 1 , this specification prioritizes:

Below is a draft technical overview based on the structure of standard IETF mail access drafts like draft-ietf-imap-imap4-06 and draft-ietf-emailcore-as-26 .