Setting mail notifications to 'Mentions/DM' sends messages for mentions, not DMs

Description

Is it expected behaviour that having email notifications set to ‘Mentions/DM’ sends notifications for mentions in public channels, but not DMs?

When I @ mention a user in the #general room, I get an email, all OK (I set up SMPT, tested it and it works)

However when I open up a DM with the person or even @ mention them in the DM, there’s no e-mail triggered.

It’s called Mentions/DMs after all, why is nothing happening on DM?

Server Setup Information

  • Version of Rocket.Chat Server:
  • Operating System: Ubuntu
  • Deployment Method: Snap

Any additional Information