You don't specify which one of the potential multi-contacts you want to e-mail to. Can I assume you have no particular preference? If that is the case, it is easy: just devise a layout in the Companies Table and drag the name, address, etc., fields from the Contacts Table on to it. It will only show (max) 350 records, because it is being drawn in the Companies Table, and for each of those records will show the first matching record from the Contacts Database.
If the Marketing department want the list in Excel format then just go ahead and export the fields from that layout. (Which, of course, leads you to realise you didn't actually have to create the layout at all, but it made the explanation clearer, I think.)
If you want to preferentially nominate one of the Contact Records it would be easy to do, just ask.
It also prompts the suggestion that you could print mailing labels directly from FM.
Hope this helps,