What it is
Nordspam is an independent DNSBL with origins in Scandinavian email security communities. It maintains IP and domain blocklists populated from trap networks and spam feeds. While not as widely deployed as Spamhaus or SpamCop, it appears in some mail server configurations across Northern Europe and in SpamAssassin-based setups.
How it affects SMTP delivery
Nordspam is typically used as a spam scoring input rather than a hard-block trigger. SpamAssassin rules query bl.nordspam.com and db.nordspam.com (domain list) as additional signals. A Nordspam listing rarely causes outright rejection on its own but contributes to composite spam scores.
What causes a listing
Listings occur from spam trap hits in the Nordspam network or from inclusion in spam feeds that Nordspam aggregates.
How to get removed
Submit a removal request via the Nordspam website. The process is manual and may take several business days.
For the full reference catalog, see the email blocklist directory.
Delisting process in detail
Nordspam operates blocklists targeting spam sources observed in Nordic mail infrastructure (Norway, Sweden, Denmark, Finland). Delisting is handled through nordspam.com’s contact form. Response times are typically within 24-48 hours for well-documented requests. Automatic decay occurs when the observed spam pattern stops. Nordspam is operated by a smaller team than global blocklists, so responses are more personalized but occasionally slower during off-hours. The blocklist focuses on regional signal rather than global coverage.
Prevention practices
Nordspam prevention follows standard anti-abuse fundamentals. Because the blocklist is regionally focused, senders reaching Nordic recipients should monitor it specifically alongside major global blocklists (Spamhaus, Barracuda). Nordic ISPs and mail providers may query Nordspam directly, so a listing there can affect delivery in the region even when other reputation signals remain clean. Gradual IP warmup and consistent send patterns matter for Nordic deliverability as elsewhere.
Common listing causes
Nordspam listings correlate with actual observed spam sending to Nordic recipients. Common causes include purchased lists containing Nordic addresses (which frequently include honeypots), compromised shared-hosting accounts on infrastructure that reaches Nordic ISPs, and coordinated spam campaigns targeting Nordic-language content. For legitimate senders operating in the region, list hygiene and confirmed opt-in are the primary prevention practices.
Related blocklists
Regional European blocklists include Nordspam, Nether, NIX Spam, and various smaller ISP-operated lists. Enterprise senders reaching European recipients should monitor these regional lists alongside Spamhaus and other global blocklists for comprehensive coverage. Nordspam’s regional focus means its impact is concentrated in Nordic delivery; senders operating primarily in North America may see minimal impact from a Nordspam listing while senders reaching Norway, Sweden, Denmark, or Finland see significant deliverability issues.
About the Author
Alaa · LinkedIn
Email infrastructure specialist with 8+ years of hands-on experience in SMTP, deliverability, and email verification. I’ve configured and troubleshot mail systems across Postfix, Exchange, and cloud relays, managed IP reputation and warmup campaigns, and built verification pipelines processing millions of addresses. My work spans DNS authentication (SPF, DKIM, DMARC, BIMI), bounce handling, blocklist monitoring, and compliance frameworks including CAN-SPAM and GDPR. I write every article on SMTPedia to give email professionals, developers, and marketers the accurate, RFC-grounded reference they need.
About SMTPedia
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