is an automated real time blocking list generated from attempts to email nonexistent accounts, on a few domains.

It follows these rules:

The block list can be queried via dns from, in the usual manner for an ip based blocklist.

Currently there are 271 blocks on the list.

Top ranking netblocks. was found in the net block

The last activity was around 2023-05-22 10:00:00-07

It is currently blocked, with a score of 74455. It will be unblocked in about 3103 days.

To check if an address is blocked, enter it here: