Not a bug User can use one google email to register multiple accounts.

[Kevin]

The question here is if xenforo can consider all variations from a gmail account as the same account.

The answer is that trying to single out Gmail alone really wouldn't solve the problem.

 

[kkm323]

with this trick i was able to create two accounts with apple.com

 

[Brandon Sheley]

Of course, but what I'm saying is that the multiple permutation usernames discussed above that are available to Gmail, are available to countless other domains by virtue of them using Gmail as their mail handler.

got ya

 

[ismael33]

The answer is that trying to single out Gmail alone really wouldn't solve the problem.

You say that due google apps? i know that but only with gmail accounts it will be an improvement or not?

 

[Hoffi]

But it works with google apps.
If you register your domain blah.com as apps domain and set the proper X Records, the adress i+am@blah.com is the same as i+donkey@blah.com, but for every software, they are different.