[Canada]

The main purpose of E2EE communication between willing participants is that the content of the communication is not checked, inspected, scanned, questioned, sampled, matched, filtered, modified, blocked, altered, or otherwise interfered with in any way whatsoever except that which is explicitly configured and consented to by a party to the conversation. (eg. anti-virus, anti-spam, group membership, etc)

That means no control of communication by the endpoint software either directly or indirectly between willing senders and recipients regardless of justification, and especially on the basis of whether or not data send from a willing sender to a willing receipient represents the "truth". The endpoint software vendor has no standing to judge that unless it's an opt-in anti-spam type feature.