Let Outlook publish your files directly to a SharePoint library instead of sending them as attachements. This add-in does that, automatically or after your choice, and leaves a link in the e-mail instead, thereby allowing you to make better use of your intranet and Exchange server. Outlook is good for a lot of things, but not for file transfers.
Works with any Frontpage or WebDAV site but of course best with SharePoint document libraries.
Free 30 days trial. Subscription $150/month for all kalmstrom.com products, unlimited number of users. Video demonstration + downloadable Word-manual and slideshow online. Also Single user version.