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POC# SMTP email sending code fails for Yahoo Mail but works fine for other servers, can anyone help?
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  1. POC# SMTP email sending code fails for Yahoo Mail but works fine for other servers, can anyone help?
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    copied!<p>I am using this code to send an SMTP email via the yahoo SMTP server, it is for a personal project I am writing.</p> <pre><code>using System.Net.Mail; using System.Net; SmtpClient theClient = new SmtpClient("smtp.mail.yahoo.com", 465); theClient.UseDefaultCredentials = false; theClient.Credentials = new NetworkCredential("username", "password"); theClient.EnableSsl = true; MailMessage theMessage = new MailMessage("username@yahoo.com", "to.someone@gmail.com"); theMessage.Subject = "Dave test from C# subject"; theMessage.Body = "Dave test from C# body"; theClient.Send(theMessage); </code></pre> <p>It's all pretty standard code for sending SMTP email, but... the server seems to throw an error. It forcibly terminates the connection. This does not happen if I use other SMTP servers like Gmail, Windows Live or various other ISP Smtp servers.</p> <p>This is the exception and stack trace: </p> <pre><code>System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. at System.Net.Mail.SmtpClient.Send(MailMessage message) at ConsoleApplication1.Program.Main(String[] args) in E:\dev\ARCSoftware.FTPProcessor\ConsoleApplication1\Program.cs:line 28 </code></pre> <p>I know the problem is not environmental though as I can send to the same server with these exact settings using Outlook Express. I am wondering if I need to send a certificate or something?</p> <p>If you, or anyone you know where has any ideas about this I would greatly appreciate some help.</p>
 

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