Filter Hook: Filters the email address for who is getting the friend request.

Filter Hook: Filters the email that the notification is going to upon successful registration with blog.

Filter Hook: Filters the subject that the notification uses upon successful registration with blog.

Filter Hook: Filters the subject that the notification uses upon successful registration without blog.

Filter Hook: Filters the message that the notification uses upon successful registration without blog.

Filter Hook: Filters the @mention notification message that will be sent to user.

Filter Hook: Filters the email that the notification is going to upon successful registration without blog.

Filter Hook: Filters the user email that the @mention notification will be sent to.

Filter Hook: Filters the @mention notification subject that will be sent to user.

Filter Hook: Filters the new comment reply notification subject that will be sent to user.