human
Here's a good function header given the following:
I wrote the below code

    def email_auth_aux(email, password, server=server, domain=domain, tls_mode=tls_mode):
        if domain:
            if (not isinstance(domain, (list, tuple))):
                domain = [str(domain)]
            if (not [d for d in domain if (email[(- len(d)):] == d)]):
                return False
        (host, port) = server.split(':')
        if (tls_mode is None):
            tls_mode = (port == '587')
        try:
            server = None
            server = smtplib.SMTP(host, port)
            server.ehlo()
            if tls_mode:
                server.starttls()
                server.ehlo()
            server.login(email, password)
            server.quit()
            return True
        except:
            logging.exception('email_auth()    failed')
            if server:
                try:
                    server.quit()
                except:
                    pass
            return False
    return email_auth_aux

What's a good function header?
assistant
#Here's a good function header.

def email_auth(server='smtp.gmail.com:587', domain='@gmail.com', tls_mode=None):