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.
If you notice yellow leaves in other areas of the tomato plant, or the yellowing at the bottom is spreading upward, this could be a sign of disease, such as curly top virus (usually curly top virus will show signs of yellowing leaves that are curling up as well), Ringtop Virus, or other diseases.
What Causes Tomato Plants' Leaves to Start Dying From the Bottom? Growing tomatoes in the home garden can be a productive and rewarding endeavor. However, a gardener may become frustrated if their well-maintained tomato plant begins dying, starting with the bottom leaves and spreading upward. This type of death could be caused by a number of pathogens, most of them fungal.