Good morning list.
Firstly, I apologize for the question if it is a wate of your time.
I come from an exim background and as such, am still finding my feet with Postfix.

What I would like to achieve is that any IP which connects to any mail server which has one of our clients IP's
gets rbl scanned.

/external_ip [spammer] {Client host [193.138.93.1] listed at dnsbl.njabl.org; }
             |
             |
            V
clients_mail_server ( eg 41.25.3.5) <unknown-MTA>
             |
             |
            V
our_smarthost_for_clients <postfix using amavisd-new>/

I would therefore like to scan the mail as the mail originated from an IP which is not our IP
So the mail would be blocked as the originating IP is listed at njabl.org

Once again, I apologize for the post if it is a waste of time.

Thanks & regards

Tom

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