Microsoft KB Archive/913616

= FIX: Error message when you try to send e-mail by using the System.Net.Mail.SmtpClient class in a Visual Studio 2005-based application =

Article ID: 913616

Article Last Modified on 12/3/2007

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APPLIES TO


 * Microsoft .NET Framework 2.0
 * Microsoft Visual Studio 2005 Professional Edition
 * Microsoft Visual Studio 2005 Standard Edition

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SYMPTOMS
Consider the following scenario. In a Microsoft Visual Studio 2005 based application, you try to send e-mail by using the System.Net.Mail.SmtpClient class. You use the DeliveryMethod.Network method from the Microsoft .NET Framework 2.0. In this scenario, you may receive the following System.Net.Mail.SmtpException error message:

Command not implemented. The server response was: Command not Supported.



CAUSE
This problem occurs because the remote SMTP server does not support the SMTP extended Hello (EHLO) command. The exception occurs when the remote SMTP server returns the 502 reply code and the System.Net.Mail.SmtpClient class expects the 500 reply code.



Download information
The following file is available for download from the Microsoft Download Center:

Download the 261492_intl_i386_zip.exe package now.

Release Date: 6/18/2007

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to obtain Microsoft support files from online services

Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file. A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next .NET Framework 2.0 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites
You must have the .NET Framework 2.0 installed to apply this hotfix.

Restart requirement
You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For more information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Additional query words: smtp ehlo 502 system.mail.smtpclient

Keywords: kbqfe kbpubtypekc kbhotfixserver KB913616

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