I ran this on my own IP (Time Warner cable dynamic IP) and was surprised to see I was in a Spamhaus list. I dug a little deeper and I found that the IP was in a

I ran this on my own IP (Time Warner cable dynamic IP) and was surprised to see I was in a Spamhaus list. I dug a little deeper and I found that the IP was in a PBL (Policy Block List). Spamhaus says the following in its FAQ about the PBL (https://www.spamhaus.org/faq/section/Spamhaus%20PBL#183 https://www.spamhaus.org/faq/section/Spamhaus%20PBL#183): "The first thing to know is: THE PBL IS NOT A BLACKLIST. You are not listed for spamming or for anything you have done. The PBL is simply a list of all of the world's dynamic IP space, i.e: IP ranges normally assigned to ISP broadband customers (DSL, DHCP, PPP, cable, dialup). It is perfectly normal for dynamic IP addresses to be listed on the PBL. In fact all dynamic IP addresses in the world should be on the PBL. Even static IPs which do not send mail should be listed in the PBL." So, in this tool, presumably any dynamic IP will turn up as "Listed in spamhaus PBL", which might cause some undue alarm to the uninformed. Maybe you should just show a yellow warning saying "you're a dynamic IP address" or something of that sort. Congrats on the tool, it is really neat!