When trying to send mail through the SMTP server, an error message is generated in the e-mail client indicating that the server cannot be found or the server terminated the connection. Certain ISPs (noteably SBC and Earthlink) block outgoing mail that is not sent through their servers.
One pound of fat is equal to about 3500 calories. That means that if you eat an extra 350 calories of food a day, which is about equal to a large piece of cake or a medium milkshake, you would gain an extra pound about every 10 days (350x10). Or you would gain a pound in about 20 days if you eat or drank an extra 175 calories a day (175x20).
If you eat fewer calories than you need, you'll lose weight. If you eat more calories than you need, you'll gain weight. If your weight is staying the same, your body is using up about the same number of calories as you eat. To gain 1 pound, you need to eat 3,500 more calories for one week. To lose 1 pound, you need to cut 3,500 calories from your diet for one week or 500 for one day.