Exclude certain users’ activity based on their email ids

Hello Team,

I would like to exclude some of the users based on their email or domain name.

I have tried using below code but it isn’t working.

function add_excluded_type( $where_conditions, $r, $select_sql, $from_sql, $join_sql ) {

    $where_conditions[]='user_email NOT LIKE "%@gmail.com"';

   return $where_conditions;
}

add_filter( 'bp_activity_get_where_conditions', 'add_excluded_type', 10, 5 );