What is a false positive on a security vendor blacklist?

A false positive is when a security vendor such as Google Safe Browsing, VirusTotal, Fortinet FortiGuard, or Sophos incorrectly classifies a legitimate domain as malicious, phishing, or spam. This triggers browser warnings, firewall blocks, and email filtering that prevent users from reaching your website — despite no actual threat being present.

How do I remove my domain from a security blacklist?

Each security vendor has a different false positive submission process. You must identify the correct channel, prepare evidence of legitimate domain use, submit a formal delisting request, and follow up persistently. BrandsDefender handles this entire process across 87 vendors including Google Safe Browsing, VirusTotal, Fortinet, Sophos, Kaspersky, and ESET.

How long does domain blacklist removal take?

Most false positive delistings are resolved within 24–72 hours. Google Safe Browsing typically responds within 24 hours of a correct review request. Fortinet FortiGuard and Sophos usually respond within 48–72 hours. Complex cases involving upstream feed propagation can take up to 7 days. BrandsDefender's average resolution time is 48 hours.

What is the no cure, no pay guarantee?

BrandsDefender only charges for confirmed successful delistings. If a security vendor refuses to remove the flag despite our best efforts, you pay nothing for that case. This applies to both one-time cases and subscription plan case credits.

Which security vendors do you handle delisting from?

BrandsDefender handles delisting from 87 security vendors including Google Safe Browsing, VirusTotal, Fortinet FortiGuard, Sophos, Kaspersky, ESET, Bitdefender, McAfee WebAdvisor, Cisco Talos, Symantec/Broadcom, Webroot BrightCloud, PhishTank, URLhaus, Netcraft, MalwarePatrol, Sucuri, and many more.

Which countries have significant Heimdal Security deployments?

Heimdal is headquartered in Denmark and has strong market penetration across Scandinavia and Northern Europe, as well as deployments across the UK, US, and global enterprise markets. Their products are particularly common in European SMBs and mid-market enterprises.

How do I submit a delisting request to Heimdal Security?

Heimdal processes false positive reports through their threat intelligence team. Evidence of site remediation and business legitimacy is required. Our team prepares the correct submission and monitors for removal confirmation.

How long does removal take?

Most cases are resolved within 24–72 hours. Complex cases involving upstream feed propagation can take up to 7 days. We keep you updated throughout.

What is the no cure, no pay guarantee?

If we can't get your domain delisted, you pay nothing. We only charge on confirmed removal.

What if the same vendor re-flags my domain?

If the same vendor re-flags within 30 days of confirmed removal and nothing changed on your side, we handle the re-submission at no extra charge.

Do you need access to my website?

No. We work entirely through vendor channels. You just provide your domain and any context about recent changes.

Security Flag Detected

Remove Your Domain from Heimdal Security

Heimdal Security blocked your domain at the DNS level. We handle removal.

Read DIY Removal Guide

Response time: 2-7 business days

Difficulty: Moderate

No cure, no pay

About the vendor

What is Heimdal Security?

Heimdal Security is a Danish cybersecurity company providing a suite of security tools including Thor Network Security, which performs DNS-based threat prevention by blocking malicious domains before a connection is established. Deployed as an enterprise endpoint agent, Heimdal's DNS filtering is used by businesses across Europe and globally to block malware, ransomware, and phishing domains at the DNS layer.

Heimdal's DNS-level blocking is applied on the endpoint device before any browser connection is attempted. When Heimdal flags your domain, every employee at an affected organization sees a silent block — no browser warning, no SSL error, just a failed connection. The block applies regardless of which browser or application they use.

Common causes

Why was your site flagged?

Heimdal's threat intelligence engine classified your domain as a malware or phishing risk
Your domain appeared in threat feeds consumed by Heimdal's network security platform
A URL on your site was associated with a ransomware distribution campaign
Your domain's DNS records or hosting infrastructure matched malicious patterns in Heimdal's model
Partner threat intelligence ingested by Heimdal listed your domain as malicious

Complete removal guide

How to remove your domain from Heimdal Security

Follow these steps to submit a false positive report yourself. This is a complete, expert-level walkthrough of the Heimdal Security delisting process.

Expected time: 2-7 business daysDifficulty: ModerateAccount required: No

What you will need

Domain URLClean scan resultsBusiness descriptionOwnership verification

Confirm Heimdal Security is flagging you

Scan your domain on VirusTotal.com and check whether Heimdal Security specifically shows a detection. Note the exact classification label (phishing, malware, suspicious, etc.) — this determines which submission path to use and how to frame your evidence.

Thoroughly audit your website

Before claiming a false positive, verify your site is genuinely clean. Check for injected scripts, compromised plugins, hidden iframes, unauthorized redirects, malicious file uploads, and outbound links to flagged domains. If your site was genuinely compromised, clean it before reporting to Heimdal Security.

Check your source code, server access logs, CMS plugin list, and all third-party scripts. A single overlooked compromise will cause your dispute to be denied.

Gather supporting evidence

Collect clean scan results from other major security vendors (Google Safe Browsing, VirusTotal aggregate), screenshots of your legitimate content, your business registration details, domain WHOIS history, and documentation of any recent security hardening measures.

Submit a false positive report to Heimdal Security

Visit Heimdal Security's official false positive or dispute submission portal. Provide your domain URL, explain your business purpose, describe why the flag is incorrect, and attach your clean evidence. Use a professional email address matching your domain for implicit ownership verification.

Response times vary by vendor. Heimdal Security typically responds within the stated timeframe if your submission is complete and well-documented.

Track your submission and follow up

Save any ticket or reference numbers provided. If you haven't received a response within the stated timeframe, follow up politely referencing your original submission. Re-check VirusTotal after receiving confirmation to verify the flag is cleared.

Verify removal and monitor for recurrence

After confirmation, re-scan your domain on VirusTotal to verify Heimdal Security's detection is cleared. Set up ongoing monitoring to catch any future flags early — recurrence within 30 days is common if the underlying trigger isn't fully addressed.

What happens after removal

Once Heimdal Security confirms removal, the update propagates to all their products and any downstream consumers of their threat data. Propagation typically takes 24-48 hours for full global coverage. VirusTotal results update on the next rescan.

Want this handled in 24-72 hours instead?

Our team has resolved thousands of Heimdal Security flags. We know the fastest paths, the right contacts, and exactly how to document your case.

Expert knowledge

Pro tips & common mistakes for Heimdal Security removal

Pro tips

Submit from a professional email address matching your domain — this implicitly proves ownership and gets faster processing.
Include clean results from other major vendors to demonstrate the Heimdal Security detection is an outlier.
If affected customers report the block, ask them to note the exact error message — this helps identify the specific product flagging you.
After clearance, request a fresh VirusTotal rescan to update the aggregated results immediately.

Common mistakes to avoid

Submitting before fixing genuine issues — vendors re-scan during review and deny requests for actually-infected sites
Using generic email addresses (Gmail, Yahoo) instead of domain-matching professional email
Providing vague explanations like "my site is legitimate" without specific evidence or business context
Not checking all URL variations (www vs non-www, HTTP vs HTTPS, specific paths vs root domain)
Resubmitting too frequently before the stated response time has elapsed

Our service

Or let BrandsDefender handle Heimdal Security for you

Skip the research and back-and-forth. Our experts resolve Heimdal Security flags in an average of 24-72 hours.

Submit your case

Tell us your domain and the flagging vendor. We review the listing and confirm it qualifies for removal.

We handle the dispute

Our team prepares the evidence package and submits a formal delisting request through the correct vendor channel.

Confirmed delisting

We monitor for confirmation and notify you when the flag is cleared. You don't pay until we succeed.

Pricing

One-time case or ongoing protection

Fix the immediate Heimdal Security flag, or protect your domain across all 87 vendors we support.

One-Time Case

€39/ vendor

Remove your flag from Heimdal Security specifically. Pay only on success.

Questions about Heimdal Security delisting

Ready to remove your Heimdal Security flag?

Our team starts within hours. You only pay when the flag is confirmed cleared.

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