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Email not sending

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Declan Ward

Growing Member



Posts:32
Growing Member




2/2/2024 8:14 AM

    I am looking a two servers. Both configured the same, as far as I can see.

    Server One: DNN 9.10.2

    ServerTwo: DNN 9.13.2

    Server One has no problems.

    Server Two fails to send test email:

    AbsoluteURL:/API/PersonaBar/ServerSettingsSmtpHost/SendTestEmail

    DefaultDataProvider:DotNetNuke.Data.SqlDataProvider, DotNetNuke

    ExceptionGUID:468312ed-f01f-4d85-a3d7-f60bf04c9242

    AssemblyVersion:

    PortalId:-1

    UserId:-1

    TabId:-1

    RawUrl:

    Referrer:

    UserAgent:

    ExceptionHash:UPlHF73t/GGpNtFq7LermfBUt9Y=

    Message:Unable to read data from the transport connection: net_io_connectionclosed.

    StackTrace:

       at System.Net.Mail.SmtpReplyReaderFactory.ProcessRead(Byte[] buffer, Int32 offset, Int32 read, Boolean readLine)
   at System.Net.Mail.SmtpReplyReaderFactory.ReadLines(SmtpReplyReader caller, Boolean oneLine)
   at System.Net.Mail.SmtpReplyReaderFactory.ReadLine(SmtpReplyReader caller)
   at System.Net.Mail.CheckCommand.Send(SmtpConnection conn, String& response)
   at System.Net.Mail.MailCommand.Send(SmtpConnection conn, Byte[] command, MailAddress from, Boolean allowUnicode)
   at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, Boolean allowUnicode, SmtpFailedRecipientException& exception)
   at System.Net.Mail.SmtpClient.Send(MailMessage message)

     

    Using a Powershell script I can send email, from Server Two, using the same SMTP server and credentials.

    Any suggestions appreciated.

     

    Regards,

    Declan Ward






    Wolfgang

    New Around Here



    Posts:4
    New Around Here




    2/2/2024 8:24 AM
      I think you have to be more specific here, whether it is a SMTP server in the MS365 cloud. Try to checkout the following issue on github:
      https://github.com/dnnsof...Platform/issues/5870

      Maybe this is your problem?

      Regards, Wolfgang





      Declan Ward

      Growing Member



      Posts:32
      Growing Member




      2/2/2024 9:13 AM

        To be more specific, OAuth is not involved. This is to an SMTP server at blacknight.com. Basic authentication using a username and password. 

        Outlook can send and receive on the same account and, as I said above, a Powershell script can also send mail to the SMTP server from the problematic server, Server Two.






        Declan Ward

        Growing Member



        Posts:32
        Growing Member




        2/2/2024 9:22 AM
          Setting SMTP server to 127.0.0.1 , anonymous authentication and running a local SMTP server (IIS6) also fails to send a test email with the same error:

          Message:Unable to read data from the transport connection: net_io_connectionclosed.





          Declan Ward

          Growing Member



          Posts:32
          Growing Member




          2/2/2024 9:54 AM
            Interesting; when I switched to SMTP Server Mode > Global and entered the same server address and credentials it all started working as it should. Using Global is not an issue for me as I only run one site per DNN instance.





            Will Strohl

            Veteran Member



            Posts:1260
            Veteran Member




            2/2/2024 1:24 PM

              So. it was only an issue when using a portal-specific setting?  This sounds like a bug.  What if you switched back to the portal setting? Does it still not work correctly?  

              Will Strohl

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