Apparently Microslop allows LookOut users to "like" a mail. It then sends out a mail with a thumbs up emoji (and $person reacted to your message).

Most useless feature I have seen in a long time and incredibly frustrating to be on the receiving end.

@h3artbl33d Gmail does that too :(

@michel

Meh, horrible. I have, relatively, more contacts om Microslop than I have on Google. But still, sucks.

@h3artbl33d have had to use 365 at a client for a few weeks and it is annoying. Even Outlook thinks its bad, it marked the digest mail of reactions from co-workers as spam
@h3artbl33d the worse being a like and then a reply (sometimes only a word) /o\

@sm4llth1ng

Yeah indeed. Especially if that reply is something like "OK" to a long, well elaborated email.