Unable to read data from the transport connection: net_io_connectionclosed

Article
2005-10-03

Question

_{Monday, October 3, 2005 1:27 PM}

I added arecovery password to the default page, when i try to recover the password i get this error message

Server Error in '/WebSite1' 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.SmtpReplyStreamFactory.ProcessRead(Byte[] buffer, Int32 offset, Int32 read, Boolean readLine) +223
   System.Net.Mail.SmtpReplyStreamFactory.ReadLines(SmtpReplyStream caller, Boolean oneLine) +303
   System.Net.Mail.SmtpReplyStreamFactory.ReadLine(SmtpReplyStream caller) +53
   System.Net.Mail.SmtpReplyStream.ReadLine() +47
   System.Net.Mail.SmtpConnection.GetConnection(String host, Int32 port) +1027
   System.Net.Mail.SmtpTransport.GetConnection(String host, Int32 port) +287
   System.Net.Mail.SmtpClient.GetConnection() +56
   System.Net.Mail.SmtpClient.Send(MailMessage message) +1664

[SmtpException: Failure sending mail.]
   System.Net.Mail.SmtpClient.Send(MailMessage message) +2171
   System.Web.UI.Util.SendMail(MailMessage message) +54
   System.Web.UI.WebControls.PasswordRecovery.SendMail(String to, String userName, String password) +415
   System.Web.UI.WebControls.PasswordRecovery.AttemptSendPasswordQuestionView() +603
   System.Web.UI.WebControls.PasswordRecovery.AttemptSendPassword() +93
   System.Web.UI.WebControls.PasswordRecovery.OnBubbleEvent(Object source, EventArgs e) +135
   System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +56
   System.Web.UI.WebControls.Button.OnCommand(CommandEventArgs e) +107
   System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +163
   System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +31
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +32
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +72
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3871

Version Information: Microsoft .NET Framework Version:2.0.50215.44; ASP.NET Version:2.0.50215.44
any clues ?

All replies (21)

_{Friday, November 11, 2005 3:42 AM}

I'm having this problem too .. did you find a solution?

Thanks!
mike123

_{Wednesday, February 15, 2006 7:40 AM}

What this error means is that System.net.mail was unable to find the smtp server.

The answer will vary depending on whether you have a fixed IP or a dynamic IP but,
basically, you need to assign a valid IP to your smtp server.

With fixed IP's this is relatively straightforward.
With dynamic IP's it takes a bit of tweaking.

Open the IIS Manager and check the properties for the smtp server.

In the Default SMTP Virtual Server's properties, in the "Access" tab,
in the Connection Control and Relay dialogs, make sure that your local IP is assigned.
( In my case, it's 10.0.0.2... )

You may also need to modify your hosts file, to point 127.0.0.1 to your machine name.
( \WINDOWS\system32\drivers\etc\hosts )

Then, in your code, assign your machine name to the smtp client :

Dim client As New SmtpClient("yourmachinename")
client.Send(mail)

_{Friday, June 22, 2007 9:53 AM}

I haven't found a solution yet.

when i find it,i'll let you know.

Ray

_{Friday, June 22, 2007 11:04 AM}

Hi,it's me again,i did what you told me and i overcame the former message,

*In my code i assigned my machine name as *administrator/Computos8,you know the username and machine name.

* and now i get the following message.*

The remote name could not be resolved: 'administrator/Computos8.

Thank you.

Ray

_{Friday, June 22, 2007 1:14 PM}