Affects Version/s: 2.3.2
Fix Version/s: None
I think that I have found an error in the validate_email() function.
The regular expression afford us to enter emails like this: email@hotmail..
this is because the function checks that the domain part of the function fits this:
So, this expression says that we have to write some character(s), then a dot, and finally some character. But this last part allow us to write a dot, because it inside the 
Please, can you tell me if this is really a bug. And if so, are someone working on it?
Thanks in advance