If you would like to receive an e-mail when someone tags you in a message in the collaboration tab (either in a media plan or a campaign report), you just need to activate the notifications as shown below.

When someone tags you in a collaboration tab you'll receive an e-mail formatted in a similar way to the one presented here.

This e-mail contains call to actions that, when clicked on, will take you to the conversation where you were mentioned.🗣