We get a handful of bad form submissions a day that result in the referral IP being banned. In lookking at the content of the form submission, they are usually in Russian and talking about male enhancement products or spending time online with beautiful women. So banning the IP seems resonable to me. What does seem odd is that we get the following two error message logged by the EmailHandler every time this happens. Can anyone explain what is happening here?
[7/13/2020 3:12:49 PM]: Error: Mail not sent.
[7/13/2020 3:12:49 PM]: Error: System.Exception: No valid SMTP host found. Please specify a valid SMTP host in Control Panel. Errors: smtp.office365.com: System.Net.Mail.SmtpException: Transaction failed. The server response was: 5.2.0 STOREDRV.Submission.Exception:SendAsDeniedException.MapiExceptionSendAsDenied; Failed to process message due to a permanent exception with message Cannot submit message. 0.35250:E3020000, 1.36674:0A000000, 1.61250:00000000, 1.45378:02000000, 1.44866:863D0000, 1.36674:0E000000, 1.61250:00000000, 1.45378:8B3D0000, 1.44866:EC010000, 16.55847:111D0000, 17.43559:0000000024020000000000000100000000000000, 20.52176:140F668C1900F01F00000000, 20.50032:140F668C8917F01F00000000, 0.35180:140F668C, 255.23226:0A000000, 255.27962:0A000000, 255.27962:0E000000, 255.31418:2D000000, 0.35250:1F001336, 1.36674:0A000000, 1.61250:00000000, 1.45378:02000000, 1.44866:9C000000, 1.36674:32000000, 1.61250:00000000, 1.45378:A1000000, 1.44866:01000000, 16.55847:08010000, 17.43559:0000000070030000000000000000000000000000, 20.52176:140F668C1900101053000000, 20.50032:140F668C891700006B000000, 0.35180:58000000, 255.23226:4800D13D, 255.27962:0A000000, 255.27962:32000000, 255.17082:DC040000, 0.27745:81000000, 4.21921:DC040000, 255.27962...
at System.Net.Mail.DataStopCommand.CheckResponse(SmtpStatusCode statusCode, String serverResponse)
at System.Net.Mail.DataStopCommand.Send(SmtpConnection conn)
at System.Net.ClosableStream.Close()
at System.Net.Mail.SmtpClient.Send(MailMessage message)
at Dynamicweb.Mailing.EmailHandler.SendUsingSmptProtocol(MailMessage mailMessage, SmtpSender sender, List`1 hostList)
at Dynamicweb.Mailing.EmailHandler.SendUsingSmptProtocol(MailMessage mailMessage, SmtpSender sender, List`1 hostList)
at Dynamicweb.Mailing.EmailHandler.Send(MailMessage mailMessage, Boolean logging, Boolean throwException, String username, String password, Int32 port, Boolean useSsl, String host)
[7/13/2020 3:12:49 PM]: Error: The message was saved for reference. Filename is 'ed9fe92d-bc81-44b9-8042-71d4efc88ff2.eml'.
Thank you,
Tim Eddings
Rupp Seeds, Inc.
