Thanks to a fellow photographer Peter Argyropoulos at Dpreview I now know how to send BIG files. Using a free service called Yousendit. I gave it a try today with a 30MB tiff (Thanks Anton Kjellén) and when the mail arrived I got a link to the tiff file and downloaded with 30kb/s.
This is indeed very good news for me. The current roof of 10-15mb is by this gone, and I can receive huge image files. So from now, TIFF’s are welcome! :D