Cant send email using IIS but can with .net 2 development server...

We have a web app that sends email notices when a user clicks a button.
If I use the .net development server to run the pages, the email
notifications are sent, no problem. If I run the site under IIS, the
emails are not sent, and I get the following error:

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 190:			{
Line 191: SmtpClient mailClient = new SmtpClient();
Line 192: mailClient.Send(mail);
Line 193: }
Line 194: //}

Any thoughts?

My email server is NOT the same as the web server.

5/27/2005 7:46:00 PM 12495 articles. 0 followers. Follow

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When you're mail server is different than the server you're running on there are two options for setting the mail server for .NET to use.  The first way is to put a section in the web.config inside of the <configuration> node like this:

   <smtp deliveryMethod="Network">
    <network host="" port="25" from=""/>

You can also set the server property on the SmtpClient like this:

SmtpClient mailClient = new SmtpClient();
mailClient.Host = "";

Hope this helps

Rich Czyzewski

Software Architect
Jacksonville, Florida

Check out my .NET 2.0 Website WebJots (Starter Kit Available)
My Blog - Beta 2 Stuff, ASP.NET, etc.

5/28/2005 3:19:10 AM
We have the web.config setup as follows:

            <smtp deliveryMethod="Network">
                <network from=""
                    defaultCredentials="true" />

The mail sends fine when running the site locally - using the built in development web server, but returns the error stated in the initial post when trying to use IIS...

5/31/2005 11:49:03 AM
I was having a similar problem but traced it to McAfee v8, which had a
default option to "prevent mass mailing worms from sending
email".  Unchecked, emails work fine now.
6/7/2005 3:47:39 AM
Problem solved. I had to switch to the IP address of the box, as the server name wasn't registered in the DNS entry
6/7/2005 11:41:57 AM

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