How to Request Delisting for Microsoft Safe Links False Positives
Question details
A sender needs to stop Microsoft Safe Links from flagging legitimate outbound links as malicious for external recipients.
- Product
- Microsoft 365
- Device & OS
- not provided
- Scenario
- Sending emails containing legitimate website URLs to opted-in subscribers or external business partners.
- Observed behavior
- Microsoft Safe Links intercepts the URLs and displays a warning classifying the legitimate website as malicious, effectively blocking user access.
Gather the complete blocked URL, a screenshot of the Safe Links warning message, and the original email headers before initiating a delisting request.
Submit a URL Review Request to Microsoft Support
The most direct way to resolve a false-positive Safe Links block is to submit the URLs for analysis to Microsoft's threat-intelligence team.
Microsoft provides an official submission portal for tenant administrators to report false positives. By submitting the blocked URL, you prompt the threat-intelligence team to review the classification and delist the site if it is deemed safe.
Log in to the Microsoft 365 Defender portal using your global administrator or security administrator credentials.
Go to the 'Actions & submissions' section on the left sidebar and select 'Submissions' to report a false positive.
Choose the 'URLs' tab, click 'Submit to Microsoft for analysis', enter the blocked URL, and explicitly select 'Should not have been blocked (False positive)'.
Request Assistance via the Microsoft Learn Community
For complex tenant scenarios involving Azure AD B2C or Exchange Online, experts in the Microsoft Learn forums can help expedite the investigation.
Work Seamlessly with WPS Office
While Microsoft handles server-level email security and Safe Links policies, you can rely on WPS Office for all your everyday document creation needs. WPS Office is a lightweight, fully compatible alternative to Microsoft Office that lets you effortlessly edit documents without expensive subscriptions.
- 1. Download the Software: Visit the official WPS Office website and click the free download button for your operating system.
- 2. Install WPS Office: Run the setup file and follow the simple on-screen instructions to install the suite.
- 3. Open Your Documents: Launch WPS Office to instantly open and edit your existing Microsoft Office files with perfect formatting retention.
Frequently Asked Questions
Why does Microsoft Safe Links block my legitimate website?
Microsoft's automated threat intelligence may mistakenly flag new domains, recently redirected URLs, or sites sharing an IP address with malicious entities as a security risk, resulting in a false-positive block.
Can I disable Safe Links to fix this issue?
You can adjust Safe Links policies within your own Microsoft 365 tenant to bypass certain URLs, but this will not lift the block for external recipients whose organizations enforce their own Safe Links policies.
How long does it take for Microsoft to process a delisting request?
Review times vary, but URL submissions made through the Microsoft 365 Defender portal or official support tickets typically receive a preliminary response or resolution within 24 to 48 hours.
What evidence is required to prove my site is safe?
You should provide the exact URL, clear screenshots of the Safe Links block warning, the original email headers including the Message-ID, and a brief explanation of the website's legitimate purpose.
