Thank you for your response. An addition to what I said is to have a access/noaccess list of domains within which you can accept emails. There are loads of ema

Thank you for your response. An addition to what I said is to have a access/noaccess list of domains within which you can accept emails. There are loads of email clients but something that would not be distraction for an end user is a market on it's own. Do you intend to have a subscription based plan or one-time fee purchase?