Why IPs typically get listed
Kempt.net's own spam policy page explains the detection method clearly. Any known-spam message that hits a kempt.net mail server causes the sending host to be listed right away.
The detection relies on how a message was sent and addressed, not on scanning its content. This is meant to avoid falsely flagging legitimate mail as spam.
Common underlying causes match standard DNSBL patterns across the industry. These include open mail relays, compromised servers acting as spam zombies, and hosts sending to spam traps.
A listing does not necessarily mean your whole mail system is compromised. It can be a single misconfigured relay or one infected machine on your network.
How to check if you're listed
You can query the zone directly with a DNS lookup tool like dig or nslookup. Reverse your IP address and append ".dnsbl.kempt.net" to the query.
A response of 127.0.0.2 means the IP is currently listed. No response means it is not.
Kempt.net's own system also returns a TXT record alongside any listing. This TXT record states the date and time of the most recent spam it caught from that host.
You can also use third-party multi-blocklist checkers, which test dnsbl.kempt.net alongside dozens of other lists at once. This saves you from running separate manual queries for every blacklist.
Try our Blacklist Monitoring tool for free today.
How to get removed
Kempt.net's delisting process is mostly automatic, unlike many larger blacklists. You generally do not need to submit a removal request for a first-time listing.
First, confirm and fix the actual problem. Check your mail server for open relay settings, malware, or compromised accounts sending unauthorized mail.
Secure the server before expecting removal to stick. Kempt.net's spam policy page states that a host will simply get relisted, and for longer, if the underlying issue isn't fixed.
If you want to discuss a listing directly, Kempt.net provides an email contact for this: bl-remove@kempt.net.
When you email them, include the listed IP address and the specific times and sender addresses of any blocked messages you're aware of. Also explain what you've done to prevent further spam.
Kempt.net's own page is explicit that requests lacking this context will likely be ignored. Don't ask for removal without describing a fix or asking a specific question about your listing.
How long it typically takes
Kempt.net's documentation states that offending hosts are typically removed about a day after their most recent spam attempt. This penalty period gets longer for repeat offenders.
A host caught spamming multiple times in the past will stay listed longer than a first-time offender. The exact length scales with how many prior incidents are on record.
Because this process runs automatically, manual delisting requests are the exception rather than the rule here. Response times for manual email inquiries aren't published, so treat this as case-by-case.
FAQ
How do I run a kempt.net blacklist check for my IP?
Query dnsbl.kempt.net directly using dig or nslookup with your IP address reversed. You can also use a multi-blocklist lookup tool that includes dnsbl.kempt.net in its list of checked zones. A result of 127.0.0.2 confirms an active listing.
How do I remove an IP from kempt.net?
In most cases you don't need to do anything manually. Fix the spam source on your server, and the automatic delisting will remove your IP within about a day of your last offense. If you want to speak with the operator directly, email bl-remove@kempt.net with your IP, timestamps, and what you've fixed.
Why does a kempt.net listing keep coming back?
Repeat listings almost always mean the underlying spam source is still active. Check for an open relay, a compromised mailbox, or malware sending mail without your knowledge. Each repeat offense also extends the penalty period, so the same unresolved issue gets you listed for longer each time.
Is a dnsbl.kempt.net listing a big deal for deliverability?
Third-party trackers generally classify the impact of this list as low, since it's a small, single-source operator. That said, if any mail admin you send to happens to check this list, your mail could still get rejected or flagged. It's worth clearing regardless of its size.
Does kempt.net list domains or only IP addresses?
Dnsbl.kempt.net is an IPv4-only list. It does not track domains or URIs the way some other blacklists do. If you're also seeing domain-based blocks, those come from a separate type of blocklist entirely.
