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).
When you gain weight, it usually creeps on slowly over several weeks or months -- not all at once in one day. Weight gain occurs when you consume more calories than you burn. A 3,500-calorie surplus -- 3,500 calories in addition to those you use every day -- will make you gain about 1 pound. Exactly how long it will take you to gain a pound depends on your basal metabolic rate, which is based on your genetics, age and gender, as well as your activity level.