This looks really good. I've just seen this message though when I verified my email address: "Do not give out your bare-naked mailhero address (xxx@mailhero.io). Always make sure you add something before the dot, otherwise you can't stop the mails from arriving!"

If anyone from Mailhero is here - why don't you block the bare-naked emails? If this becomes popular then marketeers can just search for @mailhero.io addresses and strip off any string followed by a dot so that they can spam you.