Definitely convert to jpeg before you email stuff - unless the recipient is going to have to do a lot of work on the image and needs a "real" original.

Photoshop has something of the same problem as a lot of programs, Corel included, in that it has a "default" proprietary file format that it tries to save everything in, and that is unreadable by everything else. Usually the default format is the "least lossy," so its a good way to save all of the picture info - but you need to also save a copy of anything worth keeping in a more generic format. BMP and the "plain vanilla" TIFF are about the most universal "low loss" formats. Files are huge, but you can still burn a bunch of them on a CD.

Nearly all of the low loss formats are too large to be convenient for email or other web based uses. A good jpeg can give excellent results within reason. I've printed a very few ($$$$$) downloaded 200KB jpegs at 11x17 inches with only a little visible pixilation - and stuff in the 60KB range is often good up to 5x7 inches and passable at 8x10 or a little more. I've got a couple of 3MB jpegs that I may print someday just to see how good they are, but they use a lot of ink blown up enough to tell.

John