DNSBL Lookup

Check if an IP address or domain is listed on the vspam.org blocklist. Free self-service tool for mail administrators.

How to query via DNS

You can query the vspam.org DNSBL directly using standard DNS tools. A TXT response means the entry is listed.

IP address lookup (reverse octet order)

dig 1.2.0.192.dnsbl.vspam.org TXT

Domain lookup

dig example.com.dnsbl.vspam.org TXT

The DNSBL zone is dnsbl.vspam.org. Configure it as an RBL in Postfix via reject_rbl_client dnsbl.vspam.org in smtpd_recipient_restrictions. Integration guide