1.9.13 Error when inputting non US email addresses (Well at least Australian ones anyway)

I'm in Australia.

When I'm testing the mail settings under Settings/Email/Diagnostic when I put in my Australian formatted email address (fred.bloggs@company.com.au) the valid email address validation fails and doesn't let me send.

If I change it to a US formatted address (fred.bloggs@company.com) then all is well..

There's an error in the regex that parses this email address. Maybe someone can fix?

Thanks in advance

Jcm4101