Abusix Mail Intelligence Blocklist: How to Check and Delist Your IP or Domain

If Abusix appears in a bounce message or blacklist checker, the first thing to find out is which Abusix blocklist you’re on. Abusix Mail Intelligence includes multiple datasets covering IP addresses, domains, compromised hosts, and IP ranges that shouldn’t normally send email directly.

Some listings point to a problem you need to fix, and others may be harmless or disappear automatically.

 Here’s how to identify your listing, understand what caused it, and remove your IP or domain.

What is Abusix Mail Intelligence?

Abusix Mail Intelligence is a collection of DNS-based blocklists used by mail servers and email security systems to identify spam, phishing, malware, and other unwanted traffic. 

A receiving system can query these lists while processing an email and use the result when deciding whether to accept or reject it.

The important distinction for senders is that Abusix isn’t a single blocklist. Its datasets flag different types of activity, so finding the exact list you’re on is the first step toward resolving the problem.

What do the Abusix blocklists mean?

Blocklist	What it identifies	What to do
Spam	IPs associated with spam-trap activity	Check for compromised systems and problems with list acquisition or opt-in
Policy	IPs that shouldn’t normally send email directly to mail servers	Usually no action unless you operate a mail server from that IP
Exploit	IPs displaying behavior associated with compromised or abused systems	Find and secure the affected system before requesting removal
Domain	Domains and URLs found in spam received by Abusix traps	Check for a compromised website, abused forms, or unsolicited sending involving the domain
Combined	Spam, Exploit, and Policy results	Identify which underlying list caused the result

Abusix also maintains more specialized datasets for newly observed infrastructure and other indicators of email abuse.

Why is my domain on the Abusix Domain Blocklist?

The Domain Blocklist is different from Abusix’s IP-based lists. It identifies domains and URLs found within messages received by Abusix’s spam traps, so your domain can appear there even when your sending IP has no listing.

Common causes include a compromised website being used to host spam, phishing, or malware, as well as web forms that bots can abuse to send messages containing your URL. A domain can also be listed after appearing in unsolicited email.

Abusix expands shortened URLs to identify their destinations and normalizes domains using the Mozilla Public Suffix List. Using a different subdomain therefore won’t normally avoid a listing.

Why is my IP listed by Abusix?

The answer depends on the list.

A Spam list result means Abusix has detected activity involving its spam-trap infrastructure. Common causes include purchased mailing lists, poor opt-in practices, compromised accounts, infected devices, or sending to old and unengaged addresses.

An Exploit list result points toward a compromised or abused system and should be investigated before you request removal.

A Policy list result is different. Abusix uses this list for IP addresses that shouldn’t normally connect directly to other mail servers. If you aren’t running an SMTP server from the address, a Policy listing usually isn’t something you need to fix.

How to check if you’re listed by Abusix

Use the Abusix Lookup and Delisting service to search for the affected IP address or domain. A bounce caused by Abusix may also contain a link that takes you directly to the relevant lookup result.

Pay attention to which blocklist appears in the result. A Policy listing requires a very different response from a Spam, Exploit, or Domain listing.

You can also encounter Abusix results through multi-blocklist checkers, but confirm the listing through Abusix before taking action.

How to remove an IP or domain from an Abusix blocklist

Start by fixing whatever caused the listing. Requesting removal without addressing the underlying problem can result in the IP or domain being listed again.

For a Domain listing, check your website for malicious files, redirects, compromised plugins, or other signs of an intrusion. Update your CMS, plugins, and themes, change compromised credentials, and protect forms against automated abuse.

For Spam and Exploit listings, investigate compromised accounts, servers, and devices. If you’re sending marketing email, review how addresses enter your list, use confirmed opt-in, remove inactive addresses, and stop using purchased or appended lists.

For a Policy listing, you generally don’t need to do anything unless the IP legitimately operates a mail server. In that case, configure appropriate reverse DNS for the server. Abusix rescans Policy addresses, and using its lookup service can speed up reassessment.

Once you’ve fixed the cause, use the Abusix Lookup and Delisting service and create or sign into a free account to request removal. Abusix says delisting requests are processed immediately and its DNS zones are rebuilt every minute. It can take up to around five minutes for the removal to appear.

Listings can also expire without a manual request. Abusix says listings generally expire about 5.2 days after the last bad event it observes, although the timing varies between datasets.

How to avoid another Abusix listing

Most repeat listings come back to security or list hygiene. Keep websites, servers, plugins, and other software patched, and protect public forms from automated abuse.

For email campaigns, use confirmed opt-in, remove invalid and long-inactive addresses, monitor bounces and complaints, and never rely on purchased lists. If you operate your own mail infrastructure, use dedicated sending IPs with properly configured reverse DNS.

FAQ

Is Abusix one blacklist or several?

Abusix Mail Intelligence contains multiple blocklists and datasets. They cover different signals, including spam activity, compromised systems, domains found in spam, and IP addresses that shouldn’t normally send mail directly.

Is being on the Abusix Policy list a problem?

Usually not. The Policy list includes IP addresses that aren’t expected to operate mail servers. If you don’t send email directly from that IP, Abusix says the listing shouldn’t affect your ability to send or receive email.

Why is my domain listed when my IP is clean?

The Abusix Domain Blocklist looks at domains and URLs contained within spam messages. Your domain can therefore be listed because it appeared in spam even if the IP used to send that message wasn’t yours.

How long does Abusix delisting take?

Abusix processes manual delisting requests immediately and rebuilds its DNS zones every minute. The company says it can take up to about five minutes before the removal is visible.

Does Abusix charge for delisting?

No. You need an Abusix account to request removal, but the company provides free accounts for its self-service delisting process.

What causes an Abusix listing?

Common causes include spam-trap hits, compromised accounts or devices, purchased mailing lists, poor opt-in practices, abused websites or forms, and IP addresses that aren’t expected to operate mail servers. The exact cause depends on which Abusix dataset contains the listing.