Why don't you just create Folders for the important ones, Kev?
I have....for example I have a folder for all the models coming to Spain this year, however as the communications go back as far as a year, run over 8 pages and involve over 30 models, it's a bit of a task to create all those folders.
Some of the models I will work with in Spain and the Uk too.....I will end up with over 100 folders for the various project/model combinations:
Mail in Model X Spain
Mail in Model X UK
Mail in Model Y Spain
Mail in Model Y UK