Server response: 4.3.2. Service unavailable, closing transmission channel

Question

I get this error when sending emails from my application. Can anyone suggest any solution.

Service unavailable, closing transmission channel. Server response was: 4.3.2 Service unavailable, closing transmission Channel

Below is the code.

string adminID = " [e-mail] "; MailMessage msg = new MailMessage(); msg.From = new MailAddress(adminID); msg.To.Add(" [e-mail] "); msg.Subject = "Sample Email"; msg.Body = "Hello "; SmtpClient SmtpMail = new SmtpClient(); SmtpMail.Host = "basic.smtp.ttu.edu"; SmtpMail.Port = 25; SmtpMail.Send(msg); 

Answer 1

Got a solution to the problem. The server rejected the request because this application did not have write permissions on this server. The code was excellent, just the problem was resolved. Hope this helps someone!