what is the problem ı dont understand?

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I write a sharepoint web part for sending mail

I use same code for windows form application windows form application sending mail but sharepoint web part gives me a error

Below this error

Server Error in '/' Application.
The remote name could not be resolved: 'smtp host name'

code below

C#

MailAddress ma = new MailAddress("mailadresss", "Admin");

           MailMessage posta = new MailMessage();
           posta.Body = TextBox2.Text;
           posta.Subject = TextBox1.Text;
           posta.To.Add(Label2.Text);
           posta.From = ma;
           posta.Priority = System.Net.Mail.MailPriority.High;

           SmtpClient smtp = new SmtpClient();
           smtp.Credentials = new System.Net.NetworkCredential("mailadress", "password");
           smtp.Port = 25;
           smtp.Host = "smtp host name";
           smtp.Send(posta);

I don't understand same code but givess error

Posted 28-Dec-11 0:44am

Member-2338430

Updated 28-Dec-11 0:48am

Wendelius

v3

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Wendelius 28-Dec-11 6:48am

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Not Active · Answer 1 · 2011-12-28T02:49:00

There could be a couple of things happening here. The first thing I would suggest is to use exception handling to find the actual error. Or look at the ULS logs to trace the problem. Make sure the communication between the servers is not being disrupted. If all else, SharePoint has its own mechanism for sending email, SPUtility.SendEmail[^]

E.F. Nijboer · Answer 2 · 2011-12-28T00:53:00

Solution 1

You need to change 'smtp host name' to a valid SMTP host name (SMTP server).

Good luck!

Posted 28-Dec-11 0:53am

E.F. Nijboer

Comments

Member-2338430 28-Dec-11 7:59am

valid my smtp host name can be different error what do you think about?

Member-2338430 28-Dec-11 8:00am

if smtp host name is not valid how ı send a mail with windows form application?

[no name] 28-Dec-11 8:46am

You don't get that the OP doesn't want to give the actual SMTP server name and has just put a placeholder in?

E.F. Nijboer 29-Dec-11 8:02am

But that doesn't really change anything about the answer. Both 'smtp host name' or the actual undisclosed name of the SMTP server give the same error 'The remote name could not be resolved' which would indicate that the SMTP server or related property like Port isn't correct.