You cannot check to see if your husband has another email address. This is because, you need to first know his email provider and also his username which might be difficult tracing. You just need to ask him so as to clear any doubts that you might be having.
Yes u can. Just go to ppl search and there is a click on that enables you to search for him on any social sight or email. just enter his info and if he registered an email address under his name it'll show u.