Deprecated: Return type of ZBateson\MailMimeParser\Header\HeaderContainer::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/matrixweb/public_html/whmcs2022/whmcs/vendor/zbateson/mail-mime-parser/src/Header/HeaderContainer.php on line 280