A zip file makes for a handy to place a bunch of graphics so I only need to attach the one folder.
JPGs with 100% compression are not to bad, but they do have a large kb file size.
It cost me less than $2 to snail mail 5 data DVDs of graphics with each graphic being about 20 MB in size. All in the tif format. I let them convert or not as they wish, but they do have a backup from the start.
