The information you provided previously might be misleading. I cannot be
sure of important details.

You seem to say that if an attachment is sent to multiple recipients, that
the exact same attachment works for some but not all. If that is not correct
then your information is not accurate and if it were accurate then I would
have suggested a likely cause.

I know that MHTML content cannot be shown if the file name has characters
that MHTML does not like but that would be valid for files in general. That
can cause a confusing problem. You have not described the problem in a
manner that indicates that that is the cause, but it might be the cause if
you have not accurately described the problem.

There is something called file associations; there might be a problem with
the way MHTML is associated with IE.

There might be an add-in causing problems, but I think that was already
suggested.

I think the most critical diagnostic is to ensure that the exact same file
causes the problem for some users but not all users, but you must be sure
that the file is the exact same file. Assumptions of similiarity can totally
prevent accurate diagnosis.


"Softie" wrote in message
...
But this can be an indirect idea!

Is there any other technique to handle files than with extentions in
Windows
/ IE?
May some kind of general "protocol" setting for MHTML content, like MIME
heders?


(But now I suppose it will be a virus/malware. A second PC now has same
behaviour.)



WM stores emails as .eml files, not as MHTML or MHT.
The difference is subtle. .EML files will not run in IE.
You can save emails manually as either extension and
even as plain .txt.

Yes subtle!

By the way: IE failing with *.eml seems to be only an extention issue. If
you rename WinMails *.eml to *.mhtml IE8 shows up the content of the mail
as
WinMail does.

No wonder: all of them (*.mht, *.mhtml, and *.eml) is natively a bare
text
content (just in "MHTML" format).