You need to clarify----------do you mean secondary Comcast accounts? Or accounts with some other email provider? Or do you mean from the auto-fill when you start typing in the To: field in a new email you are composing or what?
I am not a Comcast Employee. I am a Customer Expert volunteering my time to help other customers here in the Forums. We ask that you post publicly so people with similar questions may benefit from the conversation. Was your question answered? Mark the post as Best Answer!