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How to configure Postfix to use Abusix Mail Intelligence
There are various ways to configure Postfix and this is our preferred method.
Edit /etc/postfix/main.cf
Add the following in the "smtpd_recipient_restrictions" parameter. It should be placed after "reject_unauth_destination".
For example:
smtpd_recipient_restrictions = ... reject_unauth_destination # Check rDNS in domain blacklist (optional) reject_rhsbl_client APIKEY.dblack.mail.abusix.zone # Check HELO/EHLO in domain blacklist (optional) reject_rhsbl_helo APIKEY.dblack.mail.abusix.zone # Check FROM domain in blacklist (optional) reject_rhsbl_sender APIKEY.dblack.mail.abusix.zone # Check connecting IP in whitelist (optional) # permit_dnswl_client entries should be placed before any reject directives # that want to skip, but should always be before any reject_rbl_client # entries to ensure that any IP listed on the whitelist not rejected. permit_dnswl_client APIKEY.white.mail.abusix.zone # Reject any IP listed in the blacklist reject_rbl_client APIKEY.combined.mail.abusix.zone rbl_reply_maps = texthash:/etc/postfix/rbl_reply_map
Where APIKEY is replaced with the key from your Dashboard.
Next, to prevent your APIKEY from being leaked. Create /etc/postfix/rbl_reply_map with the following:
APIKEY.combined.mail.abusix.zone $rbl_code Service unavailable; $rbl_class [$rbl_what] blocked using Abusix Mail Intelligence${rbl_reason?; $rbl_reason} APIKEY.dblack.mail.abusix.zone $rbl_code Service unavailable; $rbl_class [$rbl_what] blocked using Abusix Mail Intelligence${rbl_reason?; $rbl_reason}
If you are using Postscreen then you can omit the "reject_rbl_client" entry and instead add:
postscreen_dnsbl_reply_map = texthash:/etc/postfix/postscreen_dnsbl_reply_map postscreen_dnsbl_sites = APIKEY.combined.mail.abusix.zone
Then to prevent your APIKEY from leaking, create /etc/postfix/postscreen_dnsbl_reply_map which should contain the following:
APIKEY.combined.mail.abusix.zone mail.abusix.zone
Then reload Postfix to activate this configuration.
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