Brandon Allen

<blockquote>
NOTE: As of BuddyPress 2.5.3+, this plugin is no longer needed.
</blockquote>
BuddyPress 2.5 introduced some wonderful email functionality. In order to do this, it bypasses WordPress’ default email methods. This means that any filters you applied to the <code>wp_mail_from</code> and <code>wp_mail_from_name</code> filters don’t work with emails sent by BuddyPress. This plugin translates those filters into something BuddyPress can use.

BP Email to WP Mail From Bridge

This plugin should be in core

>NOTE: As of BuddyPress 2.5.3+, this plugin is no longer needed.

meg@info

BuddyPress Notifications Manager is a plugin for BuddyPress plugin to manage the notifications system of buddypress for all users.
With Buddypress Notifications manager, the administrator can manage all the notifications settings of Buddypress ( and also the new notifications added by other plugins).
The administrator can enable/disable access to notifications page for all users. 
He can also apply or/no the current settings on the old registred members. 
In this case, an update will be processed for all members, this operation can take few second depending the number of users.
When the plugin is enabled, the notifications settings are applied to the new members indivisibly.

Buddypress Notifications Manager

BuddyPress Notifications Manager is a plugin for BuddyPress plugin to manage the notifications system of buddypress for all users.

BP Email to WP Mail From Bridge vs Buddypress Notifications Manager