Spammers don't mind if an address is good or not. They only need a spam oriented mailer that can generates random e-mail adresses and send to them. Spammers almost always use a fake sender address so I definitely don't understand why a spammer would lose time using email Verifier to clean a list. This is simply absurd and demostrates how most people have no idea of how Spamming really works. By the way this app is not free and you can be sure people that buy this are not spammer but legitimate companies. This spamming psychosis starts to be really anoying.