From: zeio on
I'm having the same problem here, Windows 2003 SP2, Exchange 2003 SP2.
Mine is happening on IMAP4SVC. It happens every time a particular user
here checks his email via IMAP.

I have tried everything as well, including disabling AV, and tried
everything I could find on this issue. Here is my error message:

Event Type: Error
Event Source: IMAP4SVC
Event Category: Content Engine
Event ID: 1023
Date: 10/29/2007
Time: 5:48:52 AM
User: N/A
Computer: CORE
Error 0x7da occurred while rendering message 0001-0000000ff2b2 for
download for user user(a)

For more information, click
0000: 41 0b 0d 00 A...

The message number changes if the bad message is moved. I don't know
how to delete that message administratively either. The message number
is not "findable" in any way I know how.

I decoded the error too, and found 0x7da relates to some color or
character display junk.

The user is using the latest Thunderbird and he gets an RFC 822 error
every time he checks the mail folder with this message in there.

I do not have excessive logging enabled either.

This is a very sinister problem, I despise when error messages can't
be fixed, why isn't this in a KB already?