Why IPs typically get listed
Most DNSBL listings, including this one, come down to a handful of common causes.
Spam complaints from recipients are one of the most common triggers.
A compromised mail server or a hacked website sending spam is another frequent cause.
Hitting a spam trap, an email address set up only to catch bad senders, can trigger a listing fast.
Missing or misconfigured SPF, DKIM, or DMARC records make your mail look less trustworthy.
Poor list hygiene, like mailing old or purchased contact lists, raises complaint rates.
Because this is a host-focused reputation list, shared hosting can complicate things further.
One bad tenant on a shared IP can affect every other customer on that same address.
How to check if you're listed
You can query either zone directly using a DNS lookup tool like dig or nslookup.
The format reverses your IP's octets and appends the zone name.
For example, an IP of 192.0.2.1 would be queried as 1.2.0.192 followed by the zone name.
A response means the zone has a record for that IP.
No response usually means the IP isn't currently listed on that zone.
Because this requires manual lookups against two separate zones, many admins prefer an automated check instead.
A monitoring tool that checks both zones on a schedule catches new listings faster than a manual check.
How to get removed
Start by confirming the listing on both hostkarma.junkemailfilter.com and black.junkemailfilter.com separately.
A listing on one zone doesn't always mean you're listed on the other.
Next, find and fix the actual cause before requesting removal.
Secure any compromised accounts, patch the mail server, and stop any list practices that generate complaints.
Add or correct your SPF, DKIM, and DMARC records if they're missing.
Once the cause is fixed, contact Junk Email Filter directly to request a review.
This operator does not appear to run a large automated self-removal form like some bigger blacklists do.
Be ready to provide your IP address and a short explanation of what you fixed.
If you manage a shared hosting environment, you may need to coordinate with your hosting provider too.
Try our Blacklist Monitoring tool for free today.
How long it typically takes
Junk Email Filter doesn't publish a guaranteed turnaround time for reviews.
Processing time on smaller, independently run blacklists can vary more than on larger operators.
Expect anywhere from same-day to a few days, depending on how quickly the operator responds.
If your fix was thorough, most requests to independent DNSBLs are resolved without repeated back and forth.
FAQ
How do I do a Hostkarma blacklist check on my own IP?
Run a DNS lookup against both hostkarma.junkemailfilter.com and black.junkemailfilter.com using your reversed IP address. You can do this with dig or nslookup from a command line. A response from either zone means that zone has a record for your IP. An automated blacklist monitoring tool can run this check for you on a schedule.
How do I remove an IP from Hostkarma?
Confirm which of the two zones has your IP listed, then fix whatever caused it. Common fixes include securing a compromised server, correcting authentication records, or cleaning up your mailing list. After that, contact Junk Email Filter directly and request a review of your IP. Provide your IP address and a brief note on what you changed.
What's the difference between the two Hostkarma zones?
Hostkarma.junkemailfilter.com is a broader reputation zone that mail servers query for more context on a sending IP. Black.junkemailfilter.com is named to suggest a narrower, blacklist-only list. The operator hasn't published a full technical breakdown of exactly how each zone scores an IP. Because of this, it's worth checking both zones separately rather than assuming one covers the other.
Does one Hostkarma listing affect every mail server I send to?
Not necessarily, since not every mail server or spam filter queries this operator's zones. However, enough mail platforms and spam filters do check DNSBLs like this one that a listing can still cause noticeable bounces or filtering. The effect depends on which mail systems your recipients use. That's part of why regular monitoring matters, since you may not notice a listing until mail starts bouncing.
Will fixing the problem guarantee removal?
Fixing the underlying issue is necessary, but it doesn't guarantee an immediate delisting. You still need to contact the operator and request a manual review in most cases. If the cause wasn't fully resolved, the IP can end up relisted after removal. That's why it helps to double check your fix, like confirming SPF and DKIM are set up correctly, before asking for review.
