Last three entries have a different point of view (there’s “you” instead of “me”) but it makes no sense.
“Email me a notification when a user sends you a message” ???
That mail message system is for a feature which was removed around 5-6 years ago, basically pm’s which were saved. Having it there on the settings is just a reminder of old times ^^
Email me on:
Friend request
Group news
Group invite
Group join request
Game challenge
…
Stuff like that.
It might also help consistency. It’s not like we already say “a game I’m playing starts/ends” but presumably people don’t get notified every time any random game starts?!!