Fatal error: Uncaught Error: Interface "Swift_Transport_Esmtp_Authenticator" not found in /home/nproduto/public_html/mail/lib/classes/Swift/Transport/Esmtp/Auth/NTLMAuthenticator.php:18 Stack trace: #0 {main} thrown in /home/nproduto/public_html/mail/lib/classes/Swift/Transport/Esmtp/Auth/NTLMAuthenticator.php on line 18