Blocking
Stop traffic before it reaches the application layer. Pick the feed format that suits the platform, a downloadable list, a kernel-level set that swaps in hourly, or a DNS zone a mail server can query per message.
In this section
Blacklist
Download the community blacklist as TXT, JSON or CSV, via API or from GitHub.
Network-Level Blocking
Kernel-level blocking with ipset or nftables, port-scoped rules, IPv6 and cloud firewalls.
DNSBL / RBL Zone
Query the blacklist per message from Postfix, Rspamd or any DNSBL-aware filter.
Groups
One account, several keys, one shared blocklist, a shared whitelist and a webhook per ban.
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