C# - Email problems

[Eugene Vital]

Hi all
I am having trouble with sending email via a C#2.0 application, I use
the same settings as I use in Outlook but I cannot get email to send.

I am trying to use SSL on port 465 and get the error below, If I disable
SSL and use port 587 all goes well.
I have been Googling for 2 days without success and this seems to be a
common problem.
Any help is appreciated.

Thanks.
Here is the code I am using.
MailMessage message = new MailMessage();
message.From = new MailAddress("my*******@mydomain.com");
message.Sender = new MailAddress("my*******@mydomain.com");
message.To.Add(new MailAddress("my*******@mydomain.com"));
message.Subject = "This is my subject";
message.Body = "This is the content";

SmtpClient smtpClient = new SmtpClient("smtp.bizmail.yahoo.com", 465);
System.Net.NetworkCredential mc = new
System.Net.NetworkCredential("my********@mydomain. com", "mypassword");

smtpClient.UseDefaultCredentials = false;
smtpClient.Credentials = mc ;
smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network ;
smtpClient.EnableSsl = true;

try{
smtpClient.Send(message);

}
catch(Exception e) {
System.Console.WriteLine(e.InnerException.ToString ());
}

smtpClient = null;

Console.Write("Press any key to continue . . . ");
Console.ReadKey(true);

The error I get is this:

Unable to read data from the transport connection: An existing
connection was forcibly closed by the remote host.

at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32
offset, Int32 size)
at System.Net.DelegatedStream.Read(Byte[] buffer, Int32 offset,
Int32 count)
at System.Net.BufferedReadStream.Read(Byte[] buffer, Int32 offset,
Int32 count)
at System.Net.Mail.SmtpReplyReaderFactory.ReadLines(S mtpReplyReader
caller, Boolean oneLine)
at System.Net.Mail.SmtpReplyReaderFactory.ReadLine(Sm tpReplyReader
caller)
at System.Net.Mail.SmtpReplyReader.ReadLine()
at System.Net.Mail.SmtpConnection.GetConnection(Strin g host, Int32 port)
at System.Net.Mail.SmtpTransport.GetConnection(String host, Int32 port)
at System.Net.Mail.SmtpClient.GetConnection()
at System.Net.Mail.SmtpClient.Send(MailMessage message)

[=?Utf-8?B?UGV0ZXIgQnJvbWJlcmcgW0MjIE1WUF0=?=]

Here is a sample method that I use with my gmail account. The port is
different, but it should work for you with the correct port:

using System;
using System.Collections.Generic;
using System.Text;

namespace PAB.Utils
{
public static class Sender
{
public static void SendGmail(string userName, string password,
string mailFrom,
string mailTo,string subject, string
message,bool isBodyHtml)
{
System.Net.Mail.MailMessage msg = new
System.Net.Mail.MailMessage(mailFrom,mailTo,
subject, message);
msg.IsBodyHtml = isBodyHtml;
System.Net.NetworkCredential cred = new
System.Net.NetworkCredential(userName, password);
System.Net.Mail.SmtpClient mailClient = new
System.Net.Mail.SmtpClient("smtp.gmail.com",587);
mailClient.EnableSsl = true;
mailClient.UseDefaultCredentials = false;
mailClient.Credentials = cred;
mailClient.Send(msg);
}
}
}
--
--Peter
"Inside every large program, there is a small program trying to get out."
http://www.eggheadcafe.com
http://petesbloggerama.blogspot.com
http://www.blogmetafinder.com

"Eugene Vital" wrote:

Hi all
I am having trouble with sending email via a C#2.0 application, I use
the same settings as I use in Outlook but I cannot get email to send.

I am trying to use SSL on port 465 and get the error below, If I disable
SSL and use port 587 all goes well.
I have been Googling for 2 days without success and this seems to be a
common problem.
Any help is appreciated.

Thanks.
Here is the code I am using.
MailMessage message = new MailMessage();
message.From = new MailAddress("my*******@mydomain.com");
message.Sender = new MailAddress("my*******@mydomain.com");
message.To.Add(new MailAddress("my*******@mydomain.com"));
message.Subject = "This is my subject";
message.Body = "This is the content";

SmtpClient smtpClient = new SmtpClient("smtp.bizmail.yahoo.com", 465);
System.Net.NetworkCredential mc = new
System.Net.NetworkCredential("my********@mydomain. com", "mypassword");

smtpClient.UseDefaultCredentials = false;
smtpClient.Credentials = mc ;
smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network ;
smtpClient.EnableSsl = true;

try{
smtpClient.Send(message);

}
catch(Exception e) {
System.Console.WriteLine(e.InnerException.ToString ());
}

smtpClient = null;

Console.Write("Press any key to continue . . . ");
Console.ReadKey(true);

The error I get is this:

Unable to read data from the transport connection: An existing
connection was forcibly closed by the remote host.

at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32
offset, Int32 size)
at System.Net.DelegatedStream.Read(Byte[] buffer, Int32 offset,
Int32 count)
at System.Net.BufferedReadStream.Read(Byte[] buffer, Int32 offset,
Int32 count)
at System.Net.Mail.SmtpReplyReaderFactory.ReadLines(S mtpReplyReader
caller, Boolean oneLine)
at System.Net.Mail.SmtpReplyReaderFactory.ReadLine(Sm tpReplyReader
caller)
at System.Net.Mail.SmtpReplyReader.ReadLine()
at System.Net.Mail.SmtpConnection.GetConnection(Strin g host, Int32 port)
at System.Net.Mail.SmtpTransport.GetConnection(String host, Int32 port)
at System.Net.Mail.SmtpClient.GetConnection()
at System.Net.Mail.SmtpClient.Send(MailMessage message)

[Eugene Vital]

Thanks,

That is pretty much the code I am using and it doesn't work.

It appears as though it is timing out then disconnecting, I have enabled
logging but it doesn't give me anything useful.

Peter Bromberg [C# MVP] wrote:

Here is a sample method that I use with my gmail account. The port is
different, but it should work for you with the correct port:

using System;
using System.Collections.Generic;
using System.Text;

namespace PAB.Utils
{
public static class Sender
{
public static void SendGmail(string userName, string password,
string mailFrom,
string mailTo,string subject, string
message,bool isBodyHtml)
{
System.Net.Mail.MailMessage msg = new
System.Net.Mail.MailMessage(mailFrom,mailTo,
subject, message);
msg.IsBodyHtml = isBodyHtml;
System.Net.NetworkCredential cred = new
System.Net.NetworkCredential(userName, password);
System.Net.Mail.SmtpClient mailClient = new
System.Net.Mail.SmtpClient("smtp.gmail.com",587);
mailClient.EnableSsl = true;
mailClient.UseDefaultCredentials = false;
mailClient.Credentials = cred;
mailClient.Send(msg);
}
}
}