Option to block or reject MIME encrypted emails from internal users at Domino server level

Many organizations use third-party email archiving solutions that cannot process MIME encrypted messages. While encryption can be controlled via policy in the Notes client, there is currently no Domino server-side mechanism to prevent or reject MIME encrypted emails—especially from mobile clients such as Verse Mobile, where sending options cannot be enforced via Traveler or AppConfig.

An enhancement is requested to provide a server-level control or filter that can detect and block MIME encrypted outbound emails from internal domains, optionally returning an informative error message to the sender. This would help organizations enforce compliance with archiving requirements and internal email security policies.