matteocontrini You'll need to edit these 2 files in your installation, or fork the repository: https://github.com/flarum/mentions/tree/master/views/emails
matteocontrini Alshain could you specify which file you edited and which action you tried after that?
matteocontrini Alshain that file is used when you click "reply" on a post. The user of the post you're replying to will receive a notification. Did you try that?