See if one of these describe your problem:
OLEXP: ErrMsg The Message Could Not Be Sent An Error Has Occurred
http://support.microsoft.com/?kbid=179503
http://support.microsoft.com/?kbid=177884
http://support.microsoft.com/?kbid=190296
http://support.microsoft.com/?kbid=299467

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Mike - http://pages.prodigy.net/michael_santovec/techhelp.htm
>I have a computer that someone opened up a virus on before symantec found it
> and quarantined it. It made a change to the host file. I fixed that and ran
[quoted text clipped - 4 lines]
> But If I go to the computer I am sending faxes too, they all got delivered.
> Any help would be appreciated . Thanks in advance