You can have up to 6 additional email accounts in Comcast besides your primary account. Sign on to your primary account and click on the Users & Settings tab at the top of the page. You should see a link in blue underneath your user name that says Create Secondary User.
Some tomato plant leaves yellow due to a lack of sunlight on mature plants. When the plants become large, bushy, and heavy with fruit, the top portions of the plant can block the lower portions from getting sunlight. This can cause the leaves to yellow, and is really nothing to worry about.
But watering leaves in the heat of the day can cause serious fungus problems, such as gray leaf spot (Stemphylium), early blight (Alternaria), and powdery mildew. The photo (above right) is of early blight, a fungal disease caused by too much water. The most important thing in watering tomato plants is consistency.