IT Whitelist & Firewall

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Overview

Polygon One is a web-based platform. In corporate networks with firewalls, proxy servers, or email security software, access to the platform or links in our emails may be blocked.

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Domains to Whitelist

The following domains must be allowed in your firewall, proxy, and email security software:

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Common Issues

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SSL Certificate Error

Symptom: The browser displays NET::ERR_CERT_AUTHORITY_INVALID or “Your connection is not private”. Cause: Your corporate firewall is performing SSL/TLS inspection and replaces the Polygon One certificate with an internal certificate that the browser does not trust. Solution:

• Exclude app.polygon-one.com from SSL inspection (whitelist), or
• Install the corporate CA certificate in the browser’s trusted root certificate store

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Email Links Not Working

Symptom: Invitation or activation links from Polygon One emails lead to an error page or invalid URL. Cause: Email security software (e.g. Microsoft Defender Safe Links, Proofpoint, Mimecast) rewrites or truncates URLs during scanning. Solution:

• Whitelist app.polygon-one.com and contact.polygon-one.com in your email security software
• Alternatively: Copy the link directly from the email and paste it manually into the browser

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Emails Going to Spam

Symptom: Emails from Polygon One are not appearing in the inbox. Solution:

• Add the sender domain contact.polygon-one.com as a trusted sender
• Check the spam folder for emails from @contact.polygon-one.com

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Technical Details for IT

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Email Authentication

Our emails are fully authenticated:

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SSL Certificate

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Contact

If you need additional technical information, please contact our support team: