How to Download Sent Mail and Custom Folders from Yahoo! Mail Using YPOPs!

Now take the psychrometer and swing it over your head; swing vigorously for about ten minutes!
You have prepared the amazing instrument by dipping a woollen sock in water, of course, and pulled it over one of the identical thermometers mounted at the psychrometer's opposing sides. Ten minutes later, you can read the thermometers. If the temperatures differ, a table shows you the relative humidity: some of the water in the sock has evaporated and cooled the thermometer inside, and the lower the humidity the more water can evaporate.
The wonderful psychrometer has been invented more than 120 years ago and is regularly used to measure the humidity on Mt. Washington in its ingeniously crafty manner, for example. YPOPs! does not make you look quite so interesting, but it, too, can do amazing things — read mail from opposing sides of your Yahoo! Mail account, for example:
›› Want to keep a copy of mail you send from Yahoo! Mail in your email program, too? With YPOPs!, you can download via POP from any Yahoo! Mail folder — including "Sent".