I use Mail.app for e-mail and have sent .jpg pictures as attachments to some PC users. When they are received the pictures are very small and are basically unusable. The PC users are very frustrated. If I send the pictures by gmail or yahoo mail, it is fine. The problem only happens using Mail. Is there something I can do on my end so this will not happen when using Mail? I am not sure if I am doing something wrong. I also use Aperture if it matters any. Any help would be greatly appreciated!