Picasa allows you to share an individual photo with others via email. It has 'Share via Email' feature which allows you to share a single photo with others via email. You can not share an entire album using this feature. You need to open an album and then select an individual photo and then click "Share' button. You have option to get a copy of that email. To do so, you have to check mark the 'Send me a copy of this email' option that you will get while sharing the photo.