Security Policy Errors

How to Report a Website Incorrectly Blocked by Microsoft Defender

Maira Mehtab Sep 22, 2026 869 views

Question details

A website owner needs to submit a review request because Microsoft Defender SmartScreen is incorrectly classifying their legitimate business website as unsafe.

Product: Microsoft Defender SmartScreen
Device & OS: not provided
Scenario: A website is flagged as a security risk by Microsoft Defender, preventing standard users from accessing the legitimate site without encountering a warning block page.
Observed behavior: Users encounter a red warning screen from SmartScreen classifying the site as unsafe, requiring the owner to go through the official feedback process to remove the false positive.

Before you start

Ensure you have the exact URL of the affected website and verify that your domain has not been recently compromised by malware or unauthorized redirects.

Solution 1Recommended

Submit a Review Request via Microsoft SmartScreen Feedback

Use the official Microsoft SmartScreen feedback portal to dispute the incorrect security classification and request a manual review of your website.

Website owners can directly appeal a false positive by filling out the Microsoft Defender SmartScreen feedback form. This prompts Microsoft's security team to rescan and evaluate the domain.

Access the feedback page

Navigate to the official Microsoft SmartScreen feedback portal. You can usually find a direct link on the red warning page itself by clicking 'Report that this site does not contain threats', or by navigating to the Microsoft security feedback website.

Enter the blocked URL

In the URL field, input the exact web address of your legitimate business website that is currently being blocked by Defender.

Select the correct classification

Choose the option indicating that you are the owner or representative of the website and that you believe the 'unsafe' or 'phishing' classification is incorrect.

Provide a detailed explanation

In the comments or explanation section, state clearly that this is a legitimate business website. Mention any recent security audits, SSL certificate updates, or malware scans you have performed to prove the site is clean.

Submit the report

Complete the required CAPTCHA verification and click the Submit button to send your review request to Microsoft's security team for evaluation.

Review Processing Time: It generally takes between 24 to 48 hours for Microsoft to process the review request, rescan the website, and remove the block if no threats are found.

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Frequently Asked Questions

Why did Microsoft Defender SmartScreen suddenly block my website?

SmartScreen uses automated systems and user reports to flag sites. Your website might have been blocked due to a temporary server compromise, an expired SSL certificate, sharing an IP address with malicious sites, or simply being a newly registered domain.

Will I receive an email confirmation when my website is unblocked?

Microsoft does not typically send an email notification when the block is lifted. You will need to manually check your website's accessibility in a browser protected by SmartScreen after 24-48 hours.

Can visitors bypass the SmartScreen block page in the meantime?

Yes, visitors can usually bypass the warning by clicking 'More information' on the red screen and selecting 'Continue to the unsafe site (not recommended)'. However, this is strongly discouraged for standard users until the site is verified safe.

What if Microsoft rejects my review request?

If the site remains blocked, it indicates Microsoft's scanners still detect malicious code or deceptive content. You should thoroughly audit your website's source code, check for hidden malware, and then submit a new feedback request once all issues are definitively resolved.

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