[Exim] Sigh. Being ignored by a postmaster.

Last weeks rejectlog was approximately 23 000 entries long. About 22 800
of those where:

2000-04-28 18:03:41 rejected EHLO from [208.181.69.233]: syntactically
invalid argument(s): (no argument given)

I have tried to contact there postmaster and get them to fix whatever is
causing this, but they have not (it has been about 2 months). I know the
are using M$ exchange (should that be M$ Excuse?)

Is there anything suggestions to deal with this? I could pop over to
their office with a large stick to help with the machine, but that seems
a tad drastic..