[exim] disable tls to a given host/network

Hi!

Is there a way to disable tls for a given host or network?
I already found several postings regarding "hosts_avoid_tls", but that
seems not to work, as i always get this error:
...option "hosts_avoid_tls" unknown ("driver" must be specified before
any private options)...
I'm currently using exim 4.34 on fedora core 1 and i need to disable tls
between exim and a specific host. If that's not possible i would also
consider completely disabling tls, but i would prefer to disable it only
for a specific host.

Any help would be great.


Ariano