BuddyPress.org

Untested, but try:

function custom_format_buddypress_notifications( $action, $item_id, $secondary_item_id, $total_items, $format = 'string' ) {

    // New custom notifications
    if ( 'custom_action' === $action ) {
        
        $custom_title = "You have new custom notification";
        $custom_link  = get_permalink( $item_id );
        $custom_text  = "You have a new custom notification";

        // WordPress Toolbar
        if ( 'string' === $format ) {
            $return = apply_filters( 'custom_filter', '<a href="' . esc_url( $custom_link ) . '" title="' . esc_attr( $custom_title ) . '">' . esc_html( $custom_text ) . '</a>', $custom_text, $custom_link );

        // Deprecated BuddyBar
        } else {
            $return = apply_filters( 'custom_filter', array(
                'text' => $custom_text,
                'link' => $custom_link
            ), $custom_link, (int) $total_items, $item_id, $secondary_item_id );
        }

        return $return;

    }

}
add_filter( 'bp_notifications_get_notifications_for_user', 'custom_format_buddypress_notifications', 20, 5 );

Ah yes, slight correction required:

<?php $args = array(
    'links'  => array(
	bp_get_the_notification_mark_link( bp_displayed_user_id() )
	)
);?>

You are welcome.

When you get to edit the file you will see something like this:

<?php bp_the_notification_action_links(); ?>

The extra code will need to go within a set of PHP tags just like the function call is.

So your code should end up looking something like this:

<?php $args = array(
    'links'  => array(
	bp_get_the_notification_mark_link( $user_id )
	)
);?>

place this in a new line before the modified function call:

<?php bp_the_notification_action_links( $args ); ?>

It looks like the function bp_the_notification_action_links() accepts $args that would allow you to remove the delete link. So you could overload your `members/single/notifications/notifications-loop.php file to include something like the following:

$args = array(
    'links'  => array(
	bp_get_the_notification_mark_link( $user_id )
	)
);

and add this to the function call: bp_the_notification_links( $args )

Something like that looks like it would work, not tested it though.

@datenfresser You can find them inside user meta
http://prntscr.com/m7gdur
To set default values you can check previous thread

Email notification default settings

One aspect I forgot was if the user is not logged in, ths would fix that:

const notificationsCounter = document.getElementById('ab-pending-notifications');
const notificationsIndicator = document.getElementById('wp-admin-bar-bp-notifications');

function counterChange() {
	if (notificationsCounter.innerText == '0') {
		notificationsIndicator.style.display = 'none';
	} else {
		notificationsIndicator.style.display = 'block';
	}
}

if (notificationCounter){
    notificationsCounter.addEventListener('change', counterChange);
}
counterChange();

As you know, with Buddypress users see an email whenever someone sends them a message and they are offline. We have asked repeatedly to your support if Cometchat overrides BP’s direct messaging function at the basic pricing tier? Because Cometchat email notifications are according to your pricing menu are only available to the highest tier Enterprise pricing and that would cost $12,000 US per year! This functionality is something that Buddypress already does, free, so if CometChat ove rides this functionality then we cannot pay you $12,000 to get it back. Are we missing something? We have tried to ask your support this question but have not received a response. Thank you.

Suggestion…

//notification alerts
function my_nav_menu_notif_counter( $menu, $args ) {      
	if (!is_user_logged_in()) {
		return $menu;
	} else {
		 if( $args->theme_location == 'primary' ) {	
			$unread = bp_notifications_get_unread_notification_count( bp_loggedin_user_id() );
			if ( 0 != $unread ) {	
				$link = '<a href="' . bp_get_notifications_unread_permalink() . '">Notifications '. $unread . '</a>';
				$notif = '<span class="noticecount">' . $link . '</span>';
				$menu .= $notif;
			}
		}
	}
	return $menu;
}
add_filter( 'wp_nav_menu_items', 'my_nav_menu_notif_counter', 10, 2 ); 

Hola, tengo el mismo el problema que @doshermanastuciudadhoy no llega el email de confirmación a los dominios hotmail…
Al eliminar el código del archivo bp-core.filters.php la web peta, tambien es cierto que yo tengo la versión 3.2.0… este es el código:

	// Add 'List-Unsubscribe' header if applicable.
	if ( ! empty( $tokens['unsubscribe'] ) && $tokens['unsubscribe'] !== wp_login_url() ) {
		$user = get_user_by( 'email', $tokens['recipient.email'] );

		$link = bp_email_get_unsubscribe_link( array(
			'user_id'           => $user->ID,
			'notification_type' => $email->get( 'type' ),
		) );

		if ( ! empty( $link ) ) {
			$headers['List-Unsubscribe'] = sprintf( '<%s>', esc_url_raw( $link ) );
		}
	}

	return $headers;
}
add_filter( 'bp_email_get_headers', 'bp_email_set_default_headers', 6, 4 );

Podrías ayudarme?