BuddyPress.org

Thank you for the response.

– Yes, the situation applies to all users, or well, the most for which I could test ofcourse.

– I cannot mention myself in activity posts on our site for I don’t know which reason, so I can’t test that unfortunately.

What I did:
in wp-content/plugins/ i created a file called bp-custom.php and added the following:

<?php add_filter('bp_email_use_wp_mail', '__return_true');