Forum User banning - How to handle gmail style "+" email
 

Hi,
If I understand correctly, gmail allows users to quickly create multiple additional emails using the "+" character. For example, if my gmail address was [email protected], I could also use [email protected], [email protected], etc...

Is there a way to ban all these using a wildcard such as spammer*@gmail.com?

If not, are the only options to ban all gmail addresses or the user's IP?