I've done a fair bit more testing and here's what I have:
by default on a number of systems, .eml files open in Outlook express -this is the default, even if you've never set up outlook express.
So, users who use lotus or outlook will be prompted to setup outlook express and asked to set it as their default mail viewer.
I have tried every setting possible for the filetype mapping of .eml to get it to open correctly in Outlook with no luck whatsoever. In fact, when someone forwards me an email as an attachment, it is an .eml file, but when I save it to disk (from the attachments list) through outlook it saves as an msg file.
So, it appears that .eml by default doesn't open in the user's default email application. Secondarily, I cannot get .eml files to open in Outlook correctly.
For these reasons, either I need a different extension that will somehow work with Outlook with an eml format or I need to use msg format.
Any ideas?
Phil