Email blocklist · DNSBL · IP addresses MON · 14 SEP 2026

Mailspike BL

Operated by Mailspike · Portugal · Zone bl.mailspike.net

About

Pure block-list view of Mailspike's data. Binary instead of graduated. Useful when the mail filter wants a yes/no answer rather than a reputation score.

Listing criteria

Hard-block list for the worst-reputation IPs. Subset of the rep.mailspike.net data presented as a binary blocklist.

How to query

For an IP address 1.2.3.4, query reversed-octets-dot-zone:

dig +short 4.3.2.1.bl.mailspike.net

A returned IP (such as 127.0.0.2) means listed. Each blocklist has its own set of return codes meaning different things; the operator's documentation explains theirs.

Operator site Delisting / lookup › Return codes ›