spam – Exim ACL & # 39; s, filter by real IP address

Many spammers send IP addresses in the mail header and the Exim function

Deny message = Your IP address was added to the blacklist
log_message = IP address in manual blacklist
hosts = + block_ip_address

get IP from that.

How will the look ACL be with the search condition? host list But for the real IP address of the email server?