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I try to delete a message and it gives me the message "The messaging interface has returned an unknown error.  If the problem persists, restart Outlook.

Posted on 2004-08-05
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Last Modified: 2010-04-08
I have done the following:

Restarted Outlook numerous times, done satisfactorily but still same error.
Repair and Detected Outlook numberous times, done satisfactorily but still same error.
Repaired Office installation, done satisfactorily but still same error. and finally
uninstalled Office and reinstalled...still same error?  Is it a virus because I did a scan and still couldn't find anything....PLEASE HELP!!  I professionally live off my emails.
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Question by:DianiG
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by:Bartender_1
ID: 11730997
I'd recommend downloading the latest updates for Microsoft Office from http://office.microsoft.com
An interesting approach was used by this person when Microsoft couldn't provide an answer:
http://www.sendecki.com/weblog/archives/individual/2004/04/02/outlook_2000_mail_stuck_in_outbox.shtml

Hope this helps!

:o)

Bartender_1
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Expert Comment

by:loveboatexpress
ID: 11731431
Which version of Outlook are you using?  Which OS are you using?
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Expert Comment

by:loveboatexpress
ID: 11731455
Try using scanpst.exe on your pst file.  The scanpst.exe file is located in c:\Program Files\Common Files\System\MSMAPI\1033\

After launching the scanpst.exe direct it to your outlook.pst file which is probably located in:
C:\Documents and Settings\[Your Logon Name]\Local Settings\Application Data\Microsoft\Outlook\

If it finds errors and asks you to repair, definitely follow its prompt to make a backup.
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by:sunray_2003
ID: 11731750
If you have Outlook 2002 in Windows xp , then this may be the cause

OL2002: Error Message: The Messaging Interface Has Returned an Unknown Error...
http://support.microsoft.com/?kbid=813517

The solution is getting latest updates from http://officeupdate.microsoft.com as previously suggested by Bartender_1

All the best

SR
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by:sunray_2003
ID: 12319352
Not sure if user tried all comments here

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by:loveboatexpress
ID: 12321974
I created a new PST file, opened it, and that manually moved all my files into that PST.  Then I deleted the old one.  It works fine now.
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by:YankeeJack
ID: 13526646
I have Outlook 2002 and all of a sudden I am getting the message "The messaging interface has returned an unknown error.  If the problem persists, restart Outlook."  This happens when I try to delete a meassge or messages.  Have tried using scanpst.exe to repair Outlook but the error message is the same.

Jack
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