By danbb38 ·
Running Outlook 2003 SP3 on XP. Recently began getting an occasional msg from System Administrator " Undeliverable". The sender is
Spoke with my ISP & they went through my email settings, all looked good but then I started getting errors on send, every time, with the error -
Sending' reported error (0x800CCC81) : 'Unknown Error 0x800CCC81'
Now the ISP is telling me it is an Outlook SP3 problem, which seems strange since I was only getting an occasional error now solid. Also suggested I remove SP3, which MS> says I have to reinstall Office to do that. Appreciate any help I can get. Just removed & re-added the mail account & got away from the constant 0x800CCC81 error but still getting the occasional "Undeliverable" error.

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Well I think you have your answer here

by OH Smeg Moderator In reply to Danb_1

The Mail Account was corrupt and when you deleted and reestablished it you fixed the main problem.

As for the occasional errors you are getting now if you have actually sent these E-Mails look for noise on the Line to the ISP as the most obvious thing occurring here.


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