[exim] stupid hosts using bogus rcpt to

I haven't been able to find an answer to this on Google. We have been
running into these mailing lists that are using bogus RCPT TOs for their
mailing list subscribes. The problem is that exim is blocking them.

ex: /var/log/exim_rejectlog:2015-07-07 12:07:04 H=smtp.centene.com
[204.145.114.242]:55605
sender verify fail for <noreply@???>: response to "RCPT
TO:<noreply@???>" from
cust35787-2.in.mailcontrol.com [208.87.234.190]
was: 550 5.7.1 <noreply@???>... Relaying denied. IP
name possibly forged [216.224.162.13]

I know why this is blocked. But, we still have to deal with these companies
that try to send mail to
bogusaddress@??? (CC:address@???) and it doesn't
work.

What can I do to allow this?