Real-Time Blacklist

The Real‐Time Blacklist feature allows you to blacklist SMTP IP addresses, RBL services, and DNS servers.

To blacklist an IP address, RBL domain, or a DNS server

1. Click Real-Time Blacklist under Diagnostics.
2. Enter an IP address in the IP address field, a FQDN for the RBL in the RBL Domain field, or DNS server information in the DNS Server field.
3. Click GO.