Hello @andreu
We checked the Buddypress plugin’s source code and found that by default they are not using WordPress core’s wp_mail function to send email.
Here is the relevant line in the Buddypress plugin’s source code where that switch happens – https://github.com/buddypress/BuddyPress/blob/master/src/bp-core/bp-core-functions.php#L3176
Our plugin depends on the filters that are called inside the wp_mail function to log the email. If that function is not called, then it is not possible for us to log the email.
You can add the following line in either your themes function.php file or as a seperate plugin to force Buddypress to use WordPress core’s wp_mail function
add_filter( 'bp_email_use_wp_mail', '__return_true' )
Meanwhile we are also trying to explore ways by which we can add BuddyPress support by using any of the existing BuddyPress specific hooks. You can keep track of our progress at https://github.com/sudar/email-log/issues/249