Abusix — Check, Delist & Monitor
Check if you're listed on Abusix Mail Intelligence. Enterprise-grade combined DNSBL covering spam, exploits, and policy violations. Free tier available.
Impact & Usage
Enterprise-grade intelligence used by major hosting providers and email security platforms. Listings here affect delivery across corporate and managed email infrastructure.
Typical users: MDaemon, SecurityGateway, SpamAssassin, and many enterprise mail servers; free tier allows 5,000 queries per day
What Gets You Listed
Aggregated detection across spam, exploit, and policy zones; combines multiple data sources including spamtraps and honeypots
How to Get Delisted
- Check your listing status using the Abusix lookup tools or query combined.mail.abusix.zone via DNS.
- Review which Abusix sub-list flagged your IP — the combined zone includes spam, exploit, and policy feeds, each with different causes.
- Fix the root cause: clean compromised systems, close open relays, correct authentication records, or address abuse complaints.
- Follow the delisting process at docs.abusix.com/docs/guardian-mail/delisting-overview. Provide evidence of remediation. Verify removal with mxio Blacklist Check.
Expected Timeline
24-72 hours depending on sub-list and severity
Auto-delist: Varies by zone; typically automatic after spam ceases. Manual delisting request available via Abusix portal
Common Causes
- Active spam sending detected by Abusix's global sensor network and spamtrap infrastructure
- Exploited or compromised server identified as part of a botnet, open proxy, or open relay
- Policy violations including missing rDNS, invalid HELO, or non-compliant mail server configuration
Prevention Tips
- Maintain valid forward-confirmed reverse DNS (FCrDNS) and proper HELO/EHLO configuration on all sending IPs
- Monitor servers for signs of compromise and keep all software patched against known exploits
- Implement SPF, DKIM, and DMARC to authenticate your outbound mail and prevent spoofing
Overview
Abusix Mail Intelligence is an enterprise-grade threat intelligence platform that aggregates multiple detection feeds into a single combined DNSBL zone. Unlike single-purpose blacklists that focus on one signal (spamtraps, backscatter, open relays), Abusix combines spam detection, exploit identification, and policy compliance into a layered system. This makes it one of the more comprehensive blacklists available and a favorite of large hosting providers, email security vendors, and managed service providers.
The combined zone at combined.mail.abusix.zone merges several sub-lists. A listing may indicate spam sending, but it could also mean your server was flagged for an open relay, missing reverse DNS, a botnet infection, or other policy violations. Understanding which sub-list triggered the listing is important for remediation — the delisting documentation at docs.abusix.com breaks this down clearly.
Abusix offers a free tier for low-volume queries (up to 5,000 per day), making it accessible to small mail administrators. Larger deployments require a commercial license. The free tier has made Abusix increasingly common in the filtering stacks of small-to-mid-size hosting companies and corporate mail servers.
Because Abusix is used by infrastructure providers rather than end-user mailbox services, a listing here tends to affect delivery to business recipients hosted on managed platforms. If you see rejections referencing Abusix, treat it as high priority — the fix usually involves addressing a real security or configuration issue, not just waiting for an auto-expiration.
Monitor Your Blacklist Status
Get alerted the moment your IP or domain appears on a blacklist. Catch listings early, before they impact deliverability.
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