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

It appears to be announced by AS4134 (CHINANET-BACKBONE No.31,Jin-rong Street, CN)

The last activity was around 2023-04-12 02:00:00-07

It is currently blocked, with a score of 28559. It will be unblocked in about 1190 days.

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