IBM DNSBL zone

Status:Active
Website:exchange.xforce.ibmcloud.com
Removal:filterdb.iss.net/dnsblinfo/

IBM hosts its own DNSBL zone dnsbl.cobion.com that can be used for DNSBL(RBL) checks. This DNSBL zone is part of the default configuration for Proventia Mail Security System and Lotus Protector for Mail Security and a zonetransfer is done automatically.

Listing Policy

The listing may occur if several emails received from the IP address were rated as spam.