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Error 80040201 when sending emails from Outlook 2007

Posted on 2008-06-24
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Last Modified: 2010-04-21
When I send an email, nothing goes into sent items or outbox, but nothing goes out, and there is an error 80040201 "unknown error" message issued. I am sending to an SMTP server.
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Question by:rich3tea
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by:war1
ID: 21856164
Hello rich3tea,

1. Reset the Outlook toolbar template. With Outlook close, do a search for and rename outcmd.dat file. Restart Outlook. Do the same for outlprnt file.

In Windows XP Outcmd.dat is located in C:\Documents and Settings\<user>\Application Data\Microsoft\Outlook folder. In Windows Vista, file is located in C:\<user>\AppData\Roaming\Microsoft\Outlook folder. It is a hidden file, so you have to unhide hidden files. Go to any folder and select Tools > Folders Options > View. Check "Show hidden files and folders". Click OK.

2. Register an important Outlook files. If using Windows xP, go to Start > Run and type regsvr32 OLE32.DLL and hit OK.

If using Vista and you get an error, run regsvr32.exe from an elevated command prompt. To get an elevated command prompt, right-click on the "Command Prompt" shortcut and select "Run as Administrator".

3. If no joy, an addin could be corrupt. Disable Outlook Addins.  Go to Tools > Trust Center > Add-Ins disable the addins.

If Outlook does not open, go to Start > Run - and type outlook /safe

4. Check if an external program running in the background is interfering with Outlook. Check Firewall, antivirus and other security programs, Yahoo and Google toolbars, and desktop search programs. Disable these programs one at a time.

5. Create a new Outlook profile.
http://support.microsoft.com/kb/829918

6. If no joy, reinstall Outlook.  Go to Add/Remove Programs and highlight Microsoft Office. Click on Install/Uninstall.  A menu will pop allowing you to choose repair or reinstall.

Hope this helps!
war1
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Author Comment

by:rich3tea
ID: 21857405
Thanks, war1
I am away from the troublesome machine for the evening now - it is 6:00pm in South Africa. I will try your comprehensive solution tomorrow and get back to you.
rich3tea
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Author Comment

by:rich3tea
ID: 21867043
It turned out that the solution seems to be to open a new profile on the user's PC, and transfer all the files to the new profile. One of the users found this. I hope this isn't a too simple solution, but I didn't get any real help on Google or Microsoft.
rich3tea
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war1 earned 125 total points
ID: 21867116
rich3tea,

Did user create a new user account or a new Outlook profile?  In step 5 of my first comment, I suggested to create a new Outlook profile.
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Author Closing Comment

by:rich3tea
ID: 31470082
It was a new Outlook profile. Your answer was comprehensive, but I just felt that adding a new Outlook profile perhaps should have been the number 1 possibility rather than number 5. Thankyou anyway.
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Expert Comment

by:mawdryn
ID: 25680209
I know this is an old question, but I had the same problem, and the cause was a contact with a bad SMTP address was the cause of the error. I had to change the email address for the contact, and then it worked.
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