Fatal error: Uncaught Error: Class 'Webklex\PHPIMAP\Support\Masks\AttachmentMask' not found in /var/www/html/lib/php-imap.obsolete/examples/custom_attachment_mask.php:13 Stack trace: #0 {main} thrown in /var/www/html/lib/php-imap.obsolete/examples/custom_attachment_mask.php on line 13