Blocking Invalid Users

Question

I'm developing an online penny auction system on PHP and MySQL. The problem is that the system gives three bids FREE per signup.

Many people register with invalid email accounts like y95dka9k7y024qn5@mailcatch.com or yopmail.com or any of that.

How I can block these accounts automatic? For now I do it manually, when I see there are more than 3 accounts invalid.

But how could I do it automatic?

Try security.stackexchange.com IMO your only option would be email confirmations. — Ammar, Aug 30 '12 at 16:20
the system validates all the emails... but with those services of disposable emails they can validate those emails — Alexander Milano Manias, Aug 30 '12 at 16:45
there is a service that handle that for you : http://ver-email.com , the service is making many checkes including uptodate black listed domains like this one. — Amr Magdy, May 25 '16 at 23:40

score 1 · Answer 1 · answered Aug 30 '12 at 16:19

1

During the subscription, when you check the email availability, check also if the email end with one of theses host name:

If it's the case, just explain that theses hostname are forbidden.

answered Aug 30 '12 at 16:19

Dekx

Yes.. but the list is bigger than that.. and how can i know all of this? – Alexander Milano Manias Aug 30 '12 at 16:45
and how can i block emails like alex1@gmail.com, alex2@gmail.com alexn@gmail.com? with the same ip? – Alexander Milano Manias Aug 30 '12 at 16:46

1 Answers1