Someone

class Email(Regexp):
    """
    Validates an email address. Note that this uses a very primitive regular
    expression and should only be used in instances where you later verify by
    other means, such as email activation or lookups.

    :param message:
        Error message to raise in case of a validation error.
    """
    def __init__(self, message=None):
        super(Email, self).__init__(r'^.+@[^.].*\.[a-z]{2,10}$', re.IGNORECASE, message)

    def __call__(self, form, field):
        if self.message is None:
            self.message = field.gettext(u'Invalid email address.')

        super(Email, self).__call__(form, field)