YSK: you can stop Microsoft users from sending 'reactions' to your email by adding a "x-ms-reactions: disallow" header
YSK: you can stop Microsoft users from sending 'reactions' to your email by adding a "x-ms-reactions: disallow" header
neilzone.co.uk /2024/07/attempting-to-stop-microsoft-users-sending-reactions-to-email-from-me-by-adding-a-postfix-header/