Filter Hook: Filters the group membership request result subject that will be sent to user.

Filter Hook: Filters the group membership request subject that will be sent to user.

Filter Hook: Filters the group membership request message that will be sent to user.

Filter Hook: Filters the user email that the group membership request will be sent to.

Filter Hook: Filters the group promotion notification message that will be sent to user.

Filter Hook: Filters the user email that the group promotion notification will be sent to.

Filter Hook: Filters the group promotion notification subject that will be sent to user.

Filter Hook: Filters the group invite notification subject that will be sent to user.

Filter Hook: Filters the group invite notification message that will be sent to user.