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.
If you or your suppliers experience problems accessing Polygon One (e.g., SSL error messages, non-functioning links), please forward this page to your IT department.
Domains for the Whitelist
The following domains must be allowed in your firewall, your proxy, and your email security software:
| Domain | Purpose |
|---|
app.polygon-one.com | Main application |
help.polygon-one.com | Help Center & documentation |
polygon-one.com | Website |
contact.polygon-one.com | Sender domain for emails |
*.supabase.co | Authentication & database |
All domains use HTTPS (port 443) exclusively. No unencrypted connections are used.
Common Problems
SSL Certificate Error
Symptom: The browser displays NET::ERR_CERT_AUTHORITY_INVALID or “Your connection is not private”.
Cause: Your corporate firewall performs SSL/TLS inspection and replaces Polygon One’s certificate with an internal certificate that the browser does not trust.
Solution:
- exempt
app.polygon-one.com from SSL inspection (whitelist), or
- install the internal corporate CA certificate in the browser’s root certificate store
Links in Emails Do Not Work
Symptom: Invitation or activation links from Polygon One emails lead to an error page or an invalid URL.
Cause: Email security software (e.g., Microsoft Defender Safe Links, Proofpoint, Mimecast) rewrites or shortens URLs during scanning.
Solution:
- whitelist
app.polygon-one.com and contact.polygon-one.com in the email security software
- alternatively: copy the link directly from the email and paste it manually into the browser
Emails Land in Spam
Symptom: Emails from Polygon One land in the spam or junk folder (especially common with Microsoft Outlook / Office 365).
Solution:
- classify the sender address
invite@contact.polygon-one.com as a trusted sender
- whitelist the domain
contact.polygon-one.com in the email security software
- search the spam folder for emails from
@contact.polygon-one.com and mark them as “Not junk” — this trains the spam filter for future emails
Technical Details for the IT Department
Email Authentication
Our emails are fully authenticated:
| Protocol | Status |
|---|
| SPF | Configured for contact.polygon-one.com |
| DKIM | Configured for contact.polygon-one.com |
| DMARC | Configured for polygon-one.com and contact.polygon-one.com (p=quarantine) |
SSL Certificate
| Property | Value |
|---|
| Domain | app.polygon-one.com |
| Issuer | Let’s Encrypt |
| Hosting | Vercel (Frankfurt, EU) |
| Protocol | TLS 1.2 / TLS 1.3 |
