Re: Sending E-Mails from ASP.NET 2.0 page using System.Net.Mail

First thing:

You need to know if your external smtp server uses:
none
basic
or
ssl
authentication.

Here is my send an email code (2.0)



System.Net.Mail.SmtpClient email = new System.Net.Mail.SmtpClient();

email.Host = "smtp.myisp.com";

email.Port = 25; // Or 465 for smtp.gmail.com ... a SSL example

switch (serv.AuthenicationMethod) // this is MY enum...telling me which type
of authentication to use. this code won't compile, but you can see what i'm
doing // serv.AuthenicationMethod is My code... and will give you a compile
error

{

case AuthenticationType.None:

break;

case AuthenticationType.Basic:

email.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;

email.UseDefaultCredentials = false;



email.Credentials = new NetworkCredential(serv.SmtpUserName,
serv.SmtpUserPassword);

break;

case AuthenticationType.SSL:

email.EnableSsl = true;

email.Credentials = new NetworkCredential(serv.SmtpUserName,
serv.SmtpUserPassword);

//email.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network ;

break;

}





System.Net.Mail.MailMessage mailMsg = new
System.Net.Mail.MailMessage(fromAddress, toAddress, emailSubject, sBody);



mailMsg.IsBodyHtml = true;



email.Send(mailMsg);



I don't see email.EnableSsl = true; in your code.

...


Now, the second thing .... is that there is a difference between the Code
failing, and the server not Sending.

In Win 2000, sometimes C# code would work, but would get "stuck"

In win2000, the location was
C:\Inetpub\mailroot\Queue

I don't know about 2003 unforunately. But if there is an equivalent folder,
where emails are "dropped in" for sending, you can look there, and see if
there are entries in there.

The way I fixed this in win2000, was to set up a "smart host" under IIS,
under the email settings.


HTH a little.

Also check:
http://www.systemnetmail.com/default.aspx





"Eric Sheu" <Eric Sheu@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:2E55F2D8-5FA1-433A-B0DE-68F5F0188E60@xxxxxxxxxxxxxxxx
> Greetings,
>
> I have been searching the web like mad for a solution to my SMTP problem.
I
> am using Windows Server 2003 and ASP.NET 2.0 w/ C# to send out e-mails
from a
> web site I have created to the members of my organization. I think my
problem
> is incorrectly setting the settings on my server or an authentication
> problem. Here is the code I have written to send a test message:
>
> -----Code Begins: Sensitive Information Replaced by [SOMETHING]-----
> MailAddress from = new MailAddress([ADDRESS], [NAME]);
> MailAddress to = new MailAddress([ADDRESS], [NAME]);
> MailAddress copy = new MailAddress([ADDRESS], [NAME]);
>
> MailMessage message = new MailMessage(from, to);
> message.Subject = "Using the SmtpClient class.";
> message.IsBodyHtml = true;
> message.Body = @"Using this feature, you can send an e-mail message from
an
> application very easily.";
> message.CC.Add(copy);
>
> NetworkCredential authInfo = new NetworkCredential([USERNAME],
[PASSWORD]);
> SmtpClient client = new SmtpClient([DOMAIN NAME], 25);
> client.UseDefaultCredentials = false;
> client.Credentials = authInfo;
> client.Send(message);
> -----Code Ends-----
>
> On Windows Server 2003, I have created an account and placed it in the
SMTP
> Users group and granted this group access to the SMTP Service. Under
> Authentication, I checked Anonymous Access and Integrated Windows
> Authentication. In the Outbound Security, I selected Integrated Windows
> Authentication and provided the username and password for the account I
> created previously.
>
> When click submit to send the e-mail, this is the error I receive (sorry
for
> copying and pasting this long error report, but I don't know what is
wrong):
> -----Error Report Begins-----
> Server Error in '/HfHv3' Application.
> --------------------------------------------------------------------------
------
> An established connection was aborted by the software in your host machine
> Description: An unhandled exception occurred during the execution of the
> current web request. Please review the stack trace for more information
about
> the error and where it originated in the code.
>
> Exception Details: System.Net.Sockets.SocketException: An established
> connection was aborted by the software in your host machine
>
> Source Error:
> Line 88: client.UseDefaultCredentials = false;
> Line 89: client.Credentials = authInfo;
> Line 90: client.Send(message);
> Line 91:
> Line 92: //try
>
> Source File:
> c:\Inetpub\wwwroot\HfHv3\intranet\board\mailinglists\sendemail.aspx.cs
> Line: 90
>
> Stack Trace:
> [SocketException (0x2745): An established connection was aborted by the
> software in your host machine]
> System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot,
> SocketAddress socketAddress) +1002146
> System.Net.Sockets.Socket.InternalConnect(EndPoint remoteEP) +33
> System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure,
> Socket s4, Socket s6, Socket& socket, IPAddress& address,
ConnectSocketState
> state, IAsyncResult asyncResult, Int32 timeout, Exception& exception) +431
>
> [WebException: Unable to connect to the remote server]
> System.Net.ServicePoint.GetConnection(PooledStream PooledStream, Object
> owner, Boolean async, IPAddress& address, Socket& abortSocket, Socket&
> abortSocket6, Int32 timeout) +1447736
> System.Net.PooledStream.Activate(Object owningObject, Boolean async,
> Int32 timeout, GeneralAsyncDelegate asyncCallback) +190
> System.Net.PooledStream.Activate(Object owningObject,
> GeneralAsyncDelegate asyncCallback) +21
> System.Net.ConnectionPool.GetConnection(Object owningObject,
> GeneralAsyncDelegate asyncCallback, Int32 creationTimeout) +318
> System.Net.Mail.SmtpConnection.GetConnection(String host, Int32 port)
+227
> System.Net.Mail.SmtpTransport.GetConnection(String host, Int32 port)
+316
> System.Net.Mail.SmtpClient.GetConnection() +42
> System.Net.Mail.SmtpClient.Send(MailMessage message) +1485
>
> [SmtpException: Failure sending mail.]
> System.Net.Mail.SmtpClient.Send(MailMessage message) +2074
> sendemail.btnSend_Click(Object sender, EventArgs e) in
> c:\Inetpub\wwwroot\HfHv3\intranet\board\mailinglists\sendemail.aspx.cs:90
> System.Web.UI.WebControls.Button.OnClick(EventArgs e) +105
> System.Web.UI.WebControls.Button.RaisePostBackEvent(String
eventArgument)
> +107
>
>
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePo
stBackEvent(String eventArgument) +7
> System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler
> sourceControl, String eventArgument) +11
> System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33
> System.Web.UI.Page.ProcessRequestMain(Boolean
> includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5102
> -----Error Report Ends-----
>
> Any help would be greatly appreciated!! Thanks a bunch!
>
> Eric


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