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SpamCop Blocklist Removal: How bl.spamcop.net Delisting Works

Published 2026-11-03 ／ Updated 2026-11-03 ／ By Yuki Nakazawa

SpamCop blocklist removal is not something you apply for. Listings expire on their own: according to SpamCop's FAQ, a listed IP is delisted automatically once 24 hours pass with no new reports. SpamCop's FAQ also asks administrators not to write in requesting early delisting, and says it may not respond if they do. Your job is to stop whatever is generating the reports, then let the timer run out.

The SpamCop Blocking List (SCBL, queried at bl.spamcop.net) lists IP addresses that sent mail which SpamCop users reported as spam, or which landed in SpamCop's spamtraps. In practice the work breaks into three steps: confirm which IP is listed, find and stop the source of the spam, and wait for the listing to expire.

This guide is based on SpamCop's official blocklist page and FAQ as of November 2026. SpamCop's own FAQ notes that its description may be out of date and that some processes are deliberately left out, so check the official pages for details. For a broader look at blocklist bounces, see our guide to email blocked by blacklists.

What the SpamCop Blocking List is

SpamCop is a service that lets people report the spam they receive. The SCBL is built from those reports. A receiving mail server looks up the connecting IP address against bl.spamcop.net and, if it is listed, may reject the message or file it as spam.

How the SCBL differs from other lists

• It lists IP addresses only. SpamCop's FAQ says the SCBL does not list email addresses or domains. Reports about URLs or addresses mentioned in the body of a spam are not counted either; a site is only listed if the same IP actually sent the mail.
• It does not list for DNS problems. The FAQ states that the SCBL does not list IPs for missing or incorrect DNS or reverse DNS.
• It is time-based. The blocklist page describes the SCBL as a time-based list: when reports stop, the IP is delisted quickly and automatically.
• It is an aggressive tool. SpamCop warns that the list may block wanted mail at times. It recommends that receivers use it with an actively maintained allow list, and that they tag and divert suspect mail rather than reject it outright.

A listing is not a verdict on you

SpamCop's FAQ says plainly that a listing does not necessarily mean the IP's owner is a spammer. Reports come from people and can be wrong, and innocent parties sometimes get listed. ISPs also reassign addresses, so a current user may inherit an address with listing history they had nothing to do with. The FAQ describes the listing history as one small item in a larger investigation, not proof.

How to check whether you are on bl.spamcop.net

1. Read the bounce message. According to SpamCop's end-user FAQ, the bounce should name the blocklist and the IP address that was rejected. If it does not show the IP, ask your email provider.
2. Look up the IP on SpamCop. Enter it in the "Am I listed?" box on the SpamCop Blocking List page (spamcop.net/bl.shtml). SpamCop's FAQ notes that this is also where you can see the time remaining until delisting.
3. Or query DNS directly. Reverse the octets of the IP and append the zone. SpamCop's FAQ gives this example for 1.2.3.4:

nslookup 4.3.2.1.bl.spamcop.net

Depending on your system, you can use host or dig instead. A listed IP returns an address, typically 127.0.0.2. An IP that is not listed returns a non-existent-domain answer. Because the FAQ says "typically", software should not depend on that exact value.

SpamCop is only one of the lists receivers consult. To see whether the same IP is also on other blocklists, run it through our blacklist checker. Waiting out a SpamCop listing will not help if a different list is the one actually rejecting your mail.

When the timer shows zero

SpamCop's administrator FAQ explains that a time of 0 means the IP has entered the delisting process. It can take up to 4 hours for the change to reach the mirrors and the sites that use the list.

How SpamCop listings work: reports, spamtraps and the 24-hour rule

SpamCop's FAQ entry "What is the SpamCop Blocking List (SCBL)?" describes the listing logic in some detail. The key rules are these:

The FAQ adds that the SpamCop team manually balances the listing threshold to keep the list as accurate as possible.

What spamtraps are

Spamtraps are addresses that SpamCop created and that no real person uses. Nothing legitimate should ever be sent to them, so mail that arrives there is treated as spam. Because SpamCop never used these addresses to sign up for anything, they only end up on lists that spammers harvested, so senders who mail old, purchased or scraped lists are the most likely to hit them. The FAQ also notes that bounces sent to spamtrap addresses can get a server listed if they reach the threshold.

Common reasons an IP gets listed

SpamCop's dispute-resolution FAQ for ISPs and administrators lists the usual causes:

• A compromised PC on your network sending spam, either directly to other mail servers or through your own mail server. Behind a NAT router, one infected machine can be enough to get the shared public IP listed.
• A virus-installed proxy, or a spammer exploiting an existing proxy or cache on your server.
• Insecure CGI or PHP scripts, such as web forms that can be abused to send mail.
• SMTP AUTH compromises, where a guessed or default username and password lets a spammer authenticate and relay through a server that is otherwise closed.
• Server misconfiguration.
• Misdirected bounces and autoresponders. Spam usually carries a forged sender, so bouncing it or auto-replying sends mail to innocent third parties. SpamCop treats these messages as spam.

Beyond these, bulk mail to people who never confirmed a subscription drives both user reports and spamtrap hits. On shared hosting, the listed IP may be shared with other customers, and their sending may be the real cause.

How to get removed: stop the source and wait

There is no standard removal form. Once the source of the spam is gone and 24 hours pass without new reports, the listing expires by itself. (One exception in SpamCop's FAQ: it says it will expedite removal of a newly secured and tested open proxy or open relay, which you should first test against another open proxy or relay blocklist.)

If you send through an email provider or web host

The listed IP belongs to your provider's mail server, and only the provider can fix the cause. SpamCop's FAQ tells end users to send the bounce message to their ISP or host. If you are on shared hosting, our guide to a blacklisted shared hosting IP covers what to ask your provider.

If the listed IP is your own connection

If the bounce shows the IP your ISP assigned to your connection, something on your network is sending spam. SpamCop's end-user FAQ suggests the following (the fourth step is our own addition, not from the FAQ):

1. Scan every computer on the network for malware, including with an antivirus product different from the one you normally use. Remember that malware can disable security software or slip past outdated definitions.
2. Update the operating system and all third-party software, and check for patches at least weekly if updates are not automatic.
3. Run anti-spyware tools as well.
4. If you run your own mail or web server, review sending logs, SMTP AUTH activity, and any forms or scripts that can send mail.
5. As a last resort, if an infection has damaged the system beyond reliable repair, reinstall the operating system.

Then watch the remaining time on the SpamCop lookup page. If the source is still active, new reports will simply list the IP again. If you cannot track the cause down yourself, you can ask us for help working through it.

Contacting SpamCop and requesting a review

SpamCop's administrator FAQ sets clear expectations for anyone who writes in:

• Do not ask for early delisting. Do not write to say you have fixed the problem and ask to be removed early; the IP delists automatically after 24 hours with no new reports. SpamCop may not reply to such requests, or to anyone who is not the administrator of the listed IP.
• If you do not know why you are listed, start at the blocklist page. If you then write in, state your relationship to the IP, your name and title, and send from postmaster@, abuse@ or another role account. Allow up to one day for a response.
• To challenge a specific report, use SpamCop's contact form, including the complete subject line, your reasoning, supporting documentation, your name and your title. SpamCop describes that contact method as being for ISP personnel. Large files should be shared by URL rather than attached.
• Keep it civil. Messages with profanity or threats go unanswered, and threats of legal action are referred to SpamCop's legal department, which delays action. SpamCop also says it does not make exceptions to its posted policies unless there has clearly been an error.

When a review makes sense

The FAQ names two grounds: a technical error, where a SpamCop server or program malfunctioned, and user error, where someone reported mail that was not spam. For the latter, include the record of that recipient's closed-loop (double opt-in) confirmation. Whether other evidence is accepted is at the sole discretion of SCBL staff.

How to avoid being listed again

• Close the compromise. Keep devices scanned and patched. For mail servers, SpamCop's SMTP AUTH FAQ recommends disabling guest accounts, removing or renaming default accounts, enforcing strong passwords, applying patches, disabling SMTP AUTH if you do not need it, and, for Exchange, following Microsoft's guidance on logging events to find the compromised account.
• Do not bounce after accepting. SpamCop's FAQ on misdirected bounces recommends configuring servers to either reject messages during delivery or accept them permanently, and not to decide on delivery after acceptance. If you must accept first, file undeliverable mail internally instead of sending it back out.
• Mail only people who confirmed. Use confirmed (double) opt-in and retire old or purchased lists. That reduces both complaints and spamtrap hits.
• Harden forms and scripts. Update old CMS installs and scripts, and make sure no form lets visitors send mail to arbitrary addresses.
• Keep authentication in order. SPF, DKIM and DMARC are not part of the SCBL's criteria, but they matter for receivers generally. See how to set up SPF, DKIM and DMARC.

Listing and delisting decisions belong to SpamCop, and receiving servers apply their own filtering as well, so delivery may not recover the moment the listing expires. If the same IP also appears on Spamhaus, see our Spamhaus removal guide.

FAQ

Official pages used

The facts in this article were checked against the official pages below at the time of publication. Policies and behavior change without notice, so check the official pages before relying on anything important.

• SpamCop: SpamCop Blocking List
• SpamCop FAQ: What is the SpamCop Blocking List (SCBL)?
• SpamCop FAQ: Dispute Resolution: ISPs and administrators
• SpamCop FAQ: Dispute Resolution: Bounce message recipients and end users
• SpamCop FAQ: How can I check if an IP is on the list?
• SpamCop FAQ: If my IP is listed, does it mean I am a spammer or my ISP hosts spammers?
• SpamCop FAQ: How do I configure my mailserver to reject mail based on the blocklist?
• SpamCop FAQ: How much does it cost?
• SpamCop FAQ: Misdirected bounces
• SpamCop FAQ: SMTP AUTH compromise
• SpamCop FAQ: Contacting SpamCop staff (ISP personnel)

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