How do I ask to be removed from a blocklist?

You found your domain or IP on a blocklist. Your first instinct is probably to hit the removal request button immediately. Don't. The single biggest mistake senders make is requesting removal before fixing whatever caused the listing. Most blocklists will re-list you within hours if the problem is still active.

Think of it this way: the blocklist isn't your enemy. It's a symptom. Fix the cause first, then ask to be removed.

Before you ask

1. Identify the root cause. Check your sending logs for the date you were listed. Did you send to a purchased list? Did a large campaign go out to an old, unvalidated segment? Did complaint rates spike? Look at your blocklist entry details if available. Some blocklists (like Spamhaus) tell you exactly why you were listed. Read it carefully.
2. Stop the bleeding. Pause any active sends from the affected IP or domain until you've confirmed the problem is fixed. Sending more mail while you're investigating digs you deeper.
3. Fix your authentication. Check that SPF, DKIM, and DMARC are all correctly configured and passing. Authentication failures are a common trigger for listings, and some blocklists won't even consider a removal request if your authentication is broken. You can verify your setup with our free SPF checker and DKIM lookup.
4. Clean your list. That doesn't only mean validating addresses. It also means taking out the people who don't care. If bad addresses, spam traps, or cold domains triggered the listing, you need to remove them before sending again. A single spam trap hit can cause a listing. Don't wait until after removal to clean. Do it now. It's good for your deliverability, your money and your statistics anyway. On its own it won't get you delisted, so keep going through this list.
5. Check for ongoing issues. Run your domain and sending IPs through a blocklist checker to see if you're on multiple lists (it happens more often than you'd think). Each list is a separate problem to investigate. Our free blocklist checker covers the major ones.
6. Read that list's delisting policy. Some are automated and require nothing from you beyond visiting a form. Others want a full written explanation. SORBS and Barracuda, for example, have their own distinct processes. Sending a polished email to an inbox that nobody monitors is wasted effort.
7. Document what you've done. Write down what caused the listing and what you changed to fix it. Blocklist operators almost always ask this when you submit a removal request. A clear, honest explanation speeds things up considerably. Vague requests get ignored or denied.

What to say

Blocklist maintainers are not customer support teams. They're mostly volunteers or small teams fighting spam on behalf of the whole email ecosystem. They field dozens of requests a day, many from senders who dodge accountability and push blame onto third parties. The ones who stand out are the ones who don't do that.

Lead with the facts, not the feelings. Give them your domain or IP, the blocklist name, and when you noticed the issue. No lengthy backstory, no drama. Just the specifics they need to pull up your listing.

Explain what caused the listing. Be honest. If it was a compromised account, say so. If you inherited a stale list and sent to contacts who hadn't heard from you in years, say that too. Operators have seen every version of "I have no idea why I'm listed." They know when someone is being evasive.

Tell them what you fixed. This is the most important part. Not what you plan to fix, what you already fixed. Locked down the compromised account? Mention it. Reset credentials and enabled two-factor authentication? Say so. Cleaned the list and removed unengaged contacts? Include it. The fix is your proof that the problem won't repeat.

Ask clearly and politely for a review. One ask. Don't demand, don't threaten, don't hint at legal action. A simple "I'd appreciate a review of the listing when you have a chance" is enough.

A rough template to adapt

"Hi, my domain [yourdomain.com] / IP [x.x.x.x] appears to be listed with [blocklist name]. I noticed this on [date] when [brief symptom, e.g. delivery failures to specific providers]. After investigating, I found [root cause]. I've since [specific fix]. I'd appreciate a review of the listing when possible. Happy to provide any additional detail you need."

That's it. Short, clear, complete.

What to avoid

• Don't blame your ESP, your list provider, or a rogue employee as a deflection. Even if it's partly true, you're responsible for your infrastructure. Own it.
• Don't follow up repeatedly if they don't respond quickly. Some blocklist operators like Spamhaus have formal processes with specific timelines. Follow them.
• Don't CC multiple people inside their organisation trying to escalate. It signals bad faith and often slows things down.
• Don't promise future fixes you haven't done yet. If the problem isn't fixed, don't request delisting. You'll just end up back on the list, and your credibility takes a hit.

If you're genuinely stuck on what caused the listing, or you're dealing with multiple blocklists at once, our SOS hotline is free and no-pitch. Sometimes a second pair of eyes finds the issue in minutes, and we'll actually help you draft the message.