Solved

System.Net.Mail - Unable to read data from the transport connection

Posted on 2006-07-05
2
1,070 Views
Last Modified: 2007-12-19
Hello

I'm migrating an app to ASP.NET 2.0 and I can't get any email out.  I've tried a few different samples of sending email via System.Net.Mail, and tried setting the Web.Config to -

 <system.net>
  <mailSettings>
   <smtp from="">
    <network host="192.168.250.104" password="" userName="" />
   </smtp>
  </mailSettings>
 </system.net>

but I always get the same error -

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:

Line 116:        
Line 117:        client.Send(message);
Line 118:    }
Line 119:  
 


The code is

    public static void SimpleMailTest()
    {
        System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage();
        message.From = new MailAddress("jakobnixon@jnixon.com");
        message.To.Add(new MailAddress("jakobnixon@jnixon.com"));
        message.Subject = "This is my subject";
        message.Body = "This is the content";

        System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient("192.168.250.104", 25);
       
        client.Send(message);
    }


The IIS SMTP service always worked fine with CDONTS and System.Web.Mail. Any help much appreciated.

JN
0
Comment
Question by:jakobnixon
2 Comments
 
LVL 96

Accepted Solution

by:
Bob Learned earned 100 total points
ID: 17044324
1) If it works fine with System.Web.Mail, then why do you need to change to System.Net.Mail?

2) Are you going through a firewall/proxy?

Bob
0
 

Author Comment

by:jakobnixon
ID: 17048985

I hadn't realised that Web.Mail was still available in 2.0 - I thought it was left with 1.1.

I've just set it up with Web.Mail and it's fine.  I've no need to use the features of Net.Mail yet, so until that day comes, the transport connetction issue isn't a problem.

Many thanks for your help -

JN
0

Featured Post

ScreenConnect 6.0 Free Trial

Want empowering updates? You're in the right place! Discover new features in ScreenConnect 6.0, based on partner feedback, to keep you business operating smoothly and optimally (the way it should be). Explore all of the extras and enhancements for yourself!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Just a quick little trick I learned recently.  Now that I'm using jQuery with abandon in my asp.net applications, I have grown tired of the following syntax:      (CODE) I suppose it just offends my sense of decency to put inline VBScript on a…
This article discusses the ASP.NET AJAX ModalPopupExtender control. In this article we will show how to use the ModalPopupExtender control, how to display/show/call the ASP.NET AJAX ModalPopupExtender control from javascript, how to show/display/cal…
This tutorial gives a high-level tour of the interface of Marketo (a marketing automation tool to help businesses track and engage prospective customers and drive them to purchase). You will see the main areas including Marketing Activities, Design …
Two types of users will appreciate AOMEI Backupper Pro: 1 - Those with PCIe drives (and haven't found cloning software that works on them). 2 - Those who want a fast clone of their boot drive (no re-boots needed) and it can clone your drive wh…

803 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question