How blacklists don’t work

Oh, how I love tossing an IP into, a true one-stop-shop to instantly check “all the things.” But I also see a lot of people freak out when they see the results realizing, “My IP is blacklisted!!!”

At this point, I usually step away from my laptop, grab a cup of tea, listen to a clip of the ocean, and ask my sister to text me the story about a kid who knocked her glasses off in gym class resulting in a seemingly endless “Velma Moment.”

That’s because there’s just so many blacklists in existence, primarily because there are no requirements to start one. Anyone with a computer connected to the internet can create a public blacklist, and as a result, not all of them are useful or apply to the messages you send.

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From , the team behind Postmark


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