Dave wrote in asking TiPb how he could email full size, full quality photos from his iPhone 3GS. Sounds simple, right, but by default if you go into Camera Roll choose one or more photos, and then choose Share, the iPhone will crunch the image(s) down to 800×600. If, however, you use the copy command, then exit, go to email, and use paste to insert the images, the iPhone will keep them at their full 2048×1526 size
See the original post here:
How To: Email Full Size iPhone 3GS Photos via Copy/Paste