Fatal error: Uncaught Error: Class "Zend\Mail\Header\GenericHeader" not found in /home/mailtrim/public_html/vendor-backup/zendframework/zend-mail/src/Header/GenericMultiHeader.php:13 Stack trace: #0 {main} thrown in /home/mailtrim/public_html/vendor-backup/zendframework/zend-mail/src/Header/GenericMultiHeader.php on line 13