Stop Microsoft users sending 'reactions' to email by adding a postfix header

6 months ago

Author expresses frustration with receiving 'reaction' emails from Microsoft users.
Microsoft has a header 'x-ms-reactions: disallow' to suppress reactions in emails.
Author adds the header to their postfix configuration to block reactions universally.
Testing shows mixed results: some reactions are blocked server-side, others are greyed out in clients.
Microsoft's implementation varies by client, leading to inconsistent user experiences.

Hasty Briefsbeta