Your emails started bouncing, a client said your messages are landing in spam, or you looked up your domain and found it on a blocklist like Spamhaus. If you’re dealing with a website blocklisted for sending spam — or “blacklisted,” as a lot of people search it — it’s a genuinely serious problem, because it hits the two things a business can’t run without: email that reaches people and a domain reputation people trust. Take a breath. This is fixable, and there’s a clear order to it. This guide explains why a hacked site ends up sending spam, how to clean it, and how to request delisting so your email and reputation recover.
Why your domain got blocklisted
Blocklists like Spamhaus, and the spam filters at the big mailbox providers, track sources of spam and abuse. When your domain or your server’s IP address lands on one, it’s because something connected to you was seen sending spam or abusive traffic. For a business, that almost never means you did it on purpose. It means one of these happened:
- Your site was hacked and is now sending spam. This is the most common cause. An attacker who got into WordPress installs a script — a “mailer” — that quietly blasts out thousands of spam or phishing emails using your site and server. You never see it; your reputation takes the hit. How they get in is the same old story we cover in why WordPress sites get hacked.
- Your contact or signup forms are being abused. Unprotected forms get hijacked to relay spam, which can get the domain flagged even without a deeper compromise.
- A mailbox or account credential was stolen and is being used to send from your domain directly.
All three share a root: something is sending mail in your name that you didn’t authorize. Getting delisted means stopping that at the source, not just asking nicely to be removed.
Why this hurts more than a search warning
It’s worth being clear about the stakes, because a blocklisting is easy to underestimate. Unlike a browser warning that mainly affects new visitors, a spam blocklisting quietly breaks your outbound communication. Invoices don’t arrive. Password resets don’t arrive. Replies to customers land in junk. And because email reputation is shared and sticky, the damage lingers after the hack is cleaned if you don’t handle the delisting properly. If your WordPress email had already gone flaky, that ties into WordPress not sending email — but a blocklisting is a reputation problem on top of a delivery one.
How to clean it and get delisted
1. Confirm where you’re listed and stop the sending
Check your domain and your server’s IP against the major blocklists so you know which ones flagged you. Then stop the bleeding — the spam has to stop before any delisting request will hold. If the site is compromised, that means finding the mailer script, not just clearing your mail queue.
2. Clean the hack at the source
Back up the site as-is first, then clean it: scan to find the malicious mailer scripts and any other injected code, remove them, and repair tampered files and database entries. Attackers who set up a spam operation almost always leave a backdoor so they can reinstall the mailer after you delete it — and if the spam restarts, your delisting won’t stick. Finding every piece, including that hidden way back in, is the hard part. The full sequence is in how to fix a hacked WordPress site, and confirming the compromise in the first place is in how to tell if your WordPress site has been hacked.
3. Close the hole and secure your mail
Close the way they got in: update WordPress itself, all plugins, and all themes; delete anything unused; reset every password — admin, hosting, database, file access (FTP/SFTP), and email accounts — and turn on strong login protection. Lock down or protect your forms so they can’t be used to relay. Make sure your domain’s email authentication (SPF, DKIM, DMARC) is set up correctly, both to stop spoofing and to prove to mailbox providers that legitimate mail is really from you.
4. Request delisting
Only once the spam has genuinely stopped and the site is clean, submit a delisting request to each blocklist that flagged you, following its process. The lists re-check the source and, if the abuse has stopped, remove the listing — and your deliverability recovers as providers see clean sending resume.
The honest part: the blocklists and mailbox providers control the timing, and no one can promise a specific delisting time. Some lists clear quickly once the abuse stops; reputation at the big providers rebuilds gradually as clean mail flows again. What you control is making sure the spam has truly stopped first — a delisting request while a hidden mailer is still firing just gets you re-listed and makes the next request slower.
How SolutionHippo handles this
We’ll be straight about where we fit. This is the situation our managed hosting is built to keep you out of in the first place. Malware scanning is part of the care that’s included with every plan — not an upsell, not a separate retainer — so a mailer script planted on a compromised site tends to get caught and removed early, before it blasts enough spam to get your domain listed. That’s prevention, not a guarantee: our scanning is designed to catch it before it gets that far, backed up well: a strong firewall stops bad traffic early, breached-password login defense keeps stolen logins out, and off-site backups 3 times a day mean even a bad day is just a restore. After any change, we verify the site still looks and works right.
And if your domain is already blocklisted and your email is bouncing? That’s work we do for sites we host, so the offer is simple: move your site to us, and we clean it as part of the move and keep it clean. We’ve cleaned infected sites, removed the mailer scripts that were sending the spam, found the backdoor that kept reinstalling them, closed the hole the attacker used, and submitted the delisting requests to get reputations restored. We won’t promise a delisting deadline we don’t control, but we will stop the spam at the source properly so the delisting has a real chance of sticking.
Domain blocklisted and email bouncing right now? It won’t recover on its own while the spam is still going out. Move your site to us: we clean it as part of the move and keep it clean. Start my move — your move starts as soon as you sign up. We’ll clean the hack, stop the sending, close the door behind it, and put the delisting requests in so your email and reputation come back. Flat pricing at $29.99 a month for a managed site, or starting at $39.99 for a store, with the protection built in — no metering, no surprises.