Unable to read data from the transport connection: net_io_connectionclosed.

Question

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I am trying to send email by using ASP.NET C# code. My website is hosted in godaddy server. It gives this error: Unable to read data from the transport connection: net_io_connectionclosed.

C#

using System.Net.Mail;
using MailMessage = System.Net.Mail.MailMessage;

protected void but_forgot_Click(object sender, EventArgs e)
{
MailMessage mail = new MailMessage();
mail.To.Add(txt_email.Text);
mail.From = new MailAddress("no-reply@abc.com");
mail.Subject = "Recovery Mail";
mail.Body = "Hello " + name + ", your recovery password is given below:" + "\n\nEmail: " + email + "\n\nPassword: " + password;
SmtpClient smtp = new SmtpClient();
smtp.Host = "smtpout.asia.secureserver.net";
smtp.Credentials = new System.Net.NetworkCredential("no-reply@abc.com", "password");
smtp.EnableSsl = false;
smtp.Port = 25;
smtp.Send(mail);
}

Posted 5-Dec-14 0:17am

Raj Negi

Updated 2-Feb-22 3:38am

Deeksha Shenoy

v3

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Comments

Herman<T>.Instance 5-Dec-14 6:27am

which line throws the exception?

Raj Negi 5-Dec-14 6:37am

smtp.Send(mail);

3 solutions

Solution 2

Try This..

C#

SmtpClient LocalClient = new SmtpClient();
            MailMessage Mail = new MailMessage();
            Mail.To.Add("ToEmail");
            Mail.From = new MailAddress("fromEmail");
            Mail.Body = "Test Message";
            Mail.Subject = "Mail Local";
          //  LocalClient.Port = 25;
           // LocalClient.Host = "127.0.0.1";
            LocalClient.DeliveryMethod = SmtpDeliveryMethod.PickupDirectoryFromIis;
            LocalClient.Credentials = new NetworkCredential("fromEmail", "Password");
            LocalClient.Send(Mail);

Posted 20-Mar-15 23:24pm

Viral Prajapati

Updated 21-Mar-15 0:13am

v2

Solution 3

its a framework issue, moving your project to framework 4.6 will resolve the issue.

Posted 2-Feb-22 3:07am

sendiltr

Comments

Richard Deeming 2-Feb-22 9:27am

Aside from the fact that 4.6 was released after the question was posted, if you'd read the accepted solution, you'd see that your suggestion clearly isn't the solution.

Member 10575951 10-Feb-22 4:05am

yes it is working after changing framework 4.5 to 4.6.1

Phahad Mirza 2-Dec-22 1:15am

changing framework also worked for me.

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Accepted Answer · 2014-12-05T01:30:00

Refer -
Cannot get email to work with GoDaddy email SMTP[^]. Implement this.

Quote:
Symptoms

Using GoDaddy SMTP server smptout.secureserver.net email errors occur such as: Mail Error occurred - Exception=Failure sending mail. Unable to read data from the transport connection: net_io_connectionclosed.
Cause

GoDaddy is blocking email relay from most 3rd party hosting providers.
Solution

Use the following SMTP settings for the GoDaddy email server:

Mail Server DNS = relay-hosting.secureserver.net
Mail Server TCP Port = 25

If this won't work, I guess you have to check with the GoDaddy Support team.