[exim] Don't verify specific sending domain

I have an issue with a domain who is not able to mail to me because it
fails sender_verify. How do I construct an ACL to allow mail from this
domain and not run a sender_verify check against the domain. What I have
is this.


domainlist unverified_domains = /usr/local/etc/exim/unverified_domains

acl_smtp_mail:
  accept  hosts         = :
  accept  hosts         = +relay_from_hosts
  accept  senders       = +unverified_senders
  accept  domains      = +unverified_domains
  require verify        = sender/no_details/callout=defer_ok
  accept

This produced this error:
2019-11-19 14:53:30 H=(mx-east-ic.fbi.gov) [153.31.119.142]
X=TLSv1.2:DHE-RSA-AES256-GCM-SHA384:256 CV=no temporarily rejected MAIL
<prvs=2197b62d5=lddates@???>: cannot test domains condition in MAIL ACL

I would appreciate any help.

Thanks,
Joe Kezar