Unable to read data from the transport connection: net_io_connectionclosed.

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Hai,

I am in problem.. Here is my code.

C#

MailMessage mail = new MailMessage(Mail.Text, "enquiry@domain.com", Subject.Text, Statement.Text);
SmtpClient SMTPServer = new SmtpClient();
SMTPServer.Host = "smtpout.secureserver.net";
SMTPServer.Port = 465;
SMTPServer.EnableSsl = true;
SMTPServer.Credentials = new System.Net.NetworkCredential("username", "psw");
SMTPServer.Send(mail);

Posted 7-Aug-12 6:10am

Member 9327701

Updated 7-Aug-12 7:15am

Sandeep Mewara

v2

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ZurdoDev 7-Aug-12 12:12pm

Sounds like you need to make sure your connecting properly.

Member 9327701 7-Aug-12 12:14pm

can you give detailed information

ZurdoDev 7-Aug-12 12:23pm

No. You are passing the basic stuff, that is host, port, and credentials but you'll have to get with whoever manages the SMTP server that you are trying to connect to and figure out what part is missing.

3 solutions

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Sandeep Mewara · Answer 1 · 2012-08-07T07:16:00

Solution 1

Looks like some issue with your implementation.

Have a look at this Microsoft Video tutorial:
Use ASP.NET to send Email from Website[^]
Tutorials on sending Email in ASP.NET[^]

Have a look at this tip too: Sending an Email in C# with or without attachments: generic routine.[^]

Posted 7-Aug-12 7:16am

Sandeep Mewara

sudarsan dash · Answer 2 · 2012-11-20T03:13:00

Solution 2

Just be sure these 2 lines are proper:

SMTPServer.Port = 25;
SMTPServer.EnableSsl = false;

Some times it sending the response and due to security reasons it is unable to send the mail.

Posted 20-Nov-12 3:13am

sudarsan dash

Mostafa Elrayes · Answer 3 · 2013-09-30T11:48:00

C#

MailMessage mail = new MailMessage(Mail.Text, "enquiry@domain.com", Subject.Text, Statement.Text);
SmtpClient SMTPServer = new SmtpClient();
SMTPServer.Host = "smtpout.secureserver.net";
SMTPServer.Port = 465;
SMTPServer.EnableSsl = true;
SMTPServer.Credentials = new System.Net.NetworkCredential("username", "psw");

SMTPServer.ServicePoint.MaxIdleTime = 1; /* this code prevent your message from terminated */

SMTPServer.Send(mail);