Server Error in '/' Application.

Unable to read data from the transport connection: net_io_connectionclosed.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.IO.IOException: Unable to read data from the transport connection: net_io_connectionclosed.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[IOException: Unable to read data from the transport connection: net_io_connectionclosed.]
   System.Net.Mail.SmtpReplyReaderFactory.ProcessRead(Byte[] buffer, Int32 offset, Int32 read, Boolean readLine) +699
   System.Net.Mail.SmtpReplyReaderFactory.ReadLines(SmtpReplyReader caller, Boolean oneLine) +288
   System.Net.Mail.SmtpReplyReaderFactory.ReadLine(SmtpReplyReader caller) +24
   System.Net.Mail.CheckCommand.Send(SmtpConnection conn, String& response) +67
   System.Net.Mail.MailCommand.Send(SmtpConnection conn, Byte[] command, MailAddress from, Boolean allowUnicode) +40
   System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, Boolean allowUnicode, SmtpFailedRecipientException& exception) +117
   System.Net.Mail.SmtpClient.Send(MailMessage message) +1743

[SmtpException: Failure sending mail.]
   System.Net.Mail.SmtpClient.Send(MailMessage message) +2674
   ASPNetPortal.Global.SendMail(String Mail, String MailLinkedFile) +1547
   URLRewriter.BaseModuleRewriter.KickUser(String ipaddress) +315
   URLRewriter.BaseModuleRewriter.BaseModuleRewriter_AuthorizeRequest(Object sender, EventArgs e) +1093
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +139
   System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +195
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +88


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.3535.0