Re: [support] How to safeguard sites from unwanted users

On 12/06/2013 10:37 PM, Jamie Holly wrote:

+1 to that! Also, they can't reuse the email. Make it harder on them, not easier.

Reread gmail's rules about its email addresses. One can generate any number of alternatives for any one email address. Besides, unless one requires email addresses to be verified during registration, users can use anything at all, even fred@example.net or joe@domain.test (both of which _can_ be valid).

Email hosts often allow +arbitrarySuffix to the localpart of email addresses, but the "+" can be another arbitrary character, I've seen hyphens used.

And then there are some domains where everything is delivered, if not to a specific addressee then to a default address and that too is configurable.