Just prefacing the notification with the community name would do a lot for branding and usability. Something like:
[Name of Community]
Bill mentioned you in a comment
Please authenticate to join the conversation.
Open
Feature Requests
Mobile App
Almost 4 years ago

Bill Szabrak
Get notified by email when there are changes.
Open
Feature Requests
Mobile App
Almost 4 years ago

Bill Szabrak
Get notified by email when there are changes.