"?B?TmluaGhvYTE=?=" wrote in
:

Get messages with attatchments that say "not a valid single file web
page''. Cannot open this file.

How to open.?

Wrong NG!

You should address your inquire to either an Outlook Express NG or support
forum for what ever anti-virus software.
And in some instances today, even your internet providers spam protection
page.