[exim] checking TLS and authenticated

Hi!

I'm having a small problem with my ACL (acl_smtp_mail).
I want to have clients using a TLS session and being authenticated
at the same time (while using MSA port).

So what I tried and didn't work out is the following:

accept  condition     = "${if and { \
                          {eq {$interface_port}{587}} \
                          {eq {$tls_certificate_verified}{1}{0}} \
                          } {1}{0}}"
        authenticated = *

I have somehow difficulties with the condition statement, maybe
someone here can help me out?

Thanx,

Michael