To force BuddyPress to use the wp_mail() WordPress function, you need to add a filter this way:

add_filter( 'bp_email_use_wp_mail', '__return_true' );

You can add this into the functions.php file of your active theme or into a bp-custom.php file at the root of your /plugins directory.

PS: if you’re using the bp-custom.php file,…[Read more]