DUL.RU has been dead since 2015
The dul.ru domain lapsed on May 19, 2015, according to blacklist tracker dnsbl.com.
Visiting dul.ru today shows a parked "domain for sale" page, not an active blacklist operator.
Around the same time, DNS for the domain was reportedly set to wildcard status.
A wildcard DNS record makes every single IP address look listed, with no exceptions.
Independent tracker dnsbl.info confirms the domain lapsed and is now blacklisting the entire internet.
Blacklist monitoring service BLalert marked dul.ru as shut down and non-operational on May 20, 2015.
Why you might see a listing today
If a tool reports your IP as listed on dul.ru, it is not personal.
The wildcard DNS means every IP queried against this zone returns a positive hit.
This has nothing to do with spam complaints, compromised servers, or anything your network did.
It is simply what happens when an abandoned DNSBL zone gets repurposed by a new domain owner.
How to check if you're listed
You can query the zone directly with a DNS tool like dig or nslookup.
Reverse your IP address, then append dul.ru, and check for a response.
Because of the wildcard, expect a "listed" result no matter which IP you check.
A blacklist checker tool will show the same result, since it queries that same dead zone.
How to get removed
There is no working removal process for dul.ru, because there is no active operator behind it.
The clearest guidance comes from dnsbl.info: the dul.ru blacklist is offline and should no longer be used.
If your mail server is rejecting or flagging mail because of dul.ru, take it out of your checks.
That means editing your spam filter or mail transfer agent (MTA) configuration, not filing a delisting request.
Historically, the operator listed a removal contact of dul@dul.ru for disputed entries.
Since the domain changed hands after 2015, that address likely no longer reaches anyone who can help.
How long it typically takes
Removing dul.ru from your own mail server configuration takes effect immediately.
There is no waiting period, because you are not asking anyone for approval.
Once the zone is out of your checks, those wildcard listings stop affecting your mail.
Try our Blacklist Monitoring tool for free today.
FAQ
How do I check if my IP is listed on DUL RU?
You can query dul.ru directly with a DNS tool like dig, using your IP in reverse order. Because the zone is wildcarded, any IP you check will come back as listed. This does not mean your IP did anything wrong. It just reflects how the abandoned domain is configured now.
How do I remove my IP from DUL RU?
There is no removal request to file, because the original operator is gone. The practical fix is deleting dul.ru from your own mail server or spam filter's blacklist checks. Once it is out of your configuration, it can no longer affect your mail. This takes effect right away, with no waiting on anyone else.
Is DUL.RU still a real blacklist?
No. Independent trackers confirm the domain lapsed and was marked shut down in May 2015. It is now wildcarded, meaning it returns a listed result for every IP address. Treating it as an active blacklist produces false positives, not accurate spam detection.
Why does my spam filter still mention dul.ru?
Some older spam filter configurations still include dul.ru from years ago. Nobody removed the entry after the blacklist went offline in 2015. Since the zone now lists every IP, it can cause legitimate mail to bounce. Removing dul.ru from that configuration fixes the problem.
Are there other lists like DUL.RU that are still active?
Yes, other dynamic IP blacklists are still running today. SORBS maintains a similar list of netblocks where address space is assigned dynamically to users and hosts. Unlike dul.ru, SORBS still operates an active removal process for its list. If dynamic IP blocking is affecting your mail, check which specific list is involved before assuming it works like dul.ru.
