To add Guardian Mail to your Exim installation:
Single configuration file
If you are using a single configuration file, open exim.conf and find the “acl_check_rcpt:” section, and add:
deny message = $dnslist_text
dnslists = <APIKEY>.combined.mail.abusix.zone
Replace <APIKEY> with “Your API key” from your account in app.abusix.com.
Then restart Exim.
Split configuration file
If you are using Exim split configuration, then open /etc/exim4/conf.d/acl/30_exim4-config_check_rcpt and find the “.ifdef CHECK_RCPT_IP_DNSBLS” section and add the following after the “.endif”:
deny dnslists = <APIKEY>.combined.mail.abusix.zone add_header = X-Warning: $sender_host_address is listed by Abusix ($dnslist_value: $dnslist_text) log_message = $sender_host_address is listed by Abusix\n$dnslist_text
Replace <APIKEY> with “Your API key” from your account in app.abusix.com.
Then restart Exim.