It is rather silly to block disposable addresses if you are going to allow free email services like gmail. In our case we block all free and disposable email a

It is rather silly to block disposable addresses if you are going to allow free email services like gmail. In our case we block all free and disposable email address since nobody without a corporate or university email address uses our service (it is aimed at scientists). We used to let anyone use the service for free without registering for small scale use, but what we found were some commercial suppliers (our target market) were just telling their customers to use our free service rather than fork out the $0.02 it would have cost them to buy a license on assays they were selling for $10. Once cutoff from the ability to freeload, quite a number of these commercial suppliers decided to buy a license from us. The good thing about this is not only did we get the business, but their customers got the benefit of our service automatically.