V 4 B L . o r g
The SMTP IPv4 DNS Block List.
WHAT WE DO:
Operate the largest and most effective SMTP IPv4 DNS Block List Service. (Read the Acceptable Use Policy here)
Via two publicly available services:
» 1. The V4BL/FULL Block List - which is a commercial/pay-for-use service; but, it can now also be accessed indirectly via several public global DNS services (more details).
Available to any IPv4 capable DNS client and now holds 656 Million IPs.
» 2. The V4BL/FREE Block List - which continues to be completely FREE and OPEN for public use at your own risk and discretion.
Available to any IPv4 capable DNS client and now holds 176.9 Million IPs.
» Is my email server listed? (How can I get my IP delisted)
» List Usage: Acceptable Use Policy/Abuses/Misuses. (How can I use this list?)
» E-mail server basic setup steps
» Some very basic troubleshooting steps
» Some typical reasons IPs get listed.
» HOWTO: Thank us properly.
» Why V4BL?
Over the last 30 days: V4BL Block List has been updated by one IP every 0.225 seconds.
Over the past year the list has grown by 137,659,341 IPs. Oldest IP: 1930 days listed.
At any given moment, there are more than 150M new IPs queued awaiting basic compliancy checks.
See our historical results/progress here.
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