Fatal error: Uncaught Swift_RfcComplianceException: Address in mailbox given [] does not comply with RFC 2822, 3.6.2. in /html/vag_event/typo3_src-8.7.9/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Mime/Headers/MailboxHeader.php:347 Stack trace: #0 /html/vag_event/typo3_src-8.7.9/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Mime/Headers/MailboxHeader.php(263): Swift_Mime_Headers_MailboxHeader->_assertValidAddress('') #1 /html/vag_event/typo3_src-8.7.9/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Mime/Headers/MailboxHeader.php(106): Swift_Mime_Headers_MailboxHeader->normalizeMailboxes(Array) #2 /html/vag_event/typo3_src-8.7.9/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Mime/Headers/MailboxHeader.php(63): Swift_Mime_Headers_MailboxHeader->setNameAddresses(Array) #3 /html/vag_event/typo3_src-8.7.9/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Mime/SimpleMimeEntity.php(592): Swift_Mime_Headers_MailboxHeader->setFieldBodyModel(Array) #4 /html/vag_event/typo3_src-8.7.9/vendor/swiftmailer/swiftmailer/lib/clas in /html/vag_event/typo3_src-8.7.9/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Mime/Headers/MailboxHeader.php on line 347