eMail suppression list to stop disposable emails

it will be nice to add a suppression list where we can add a list of email domains mostly the ones that offer disposable emails to stop them from been added to our member database and a step to stop spams

It is already in alpha. But cannot assure, it will deliver in future or not.

From the related commit, the Suppression List feature takes Mailgun’s Suppressions into account. These are centered around good deliverability, not controlling signups.