Support
Support & Help
We're here to help. Reach out and we'll get back to you, or browse the documentation.
Last updated: July 13, 2026
Contact
For general, technical or billing questions, email us at:
support@securestamp.onlineWe reply during business hours, typically within 1–2 business days.
Documentation
Installation guides, API reference and trust verification.
View documentation →Security
To report a vulnerability or security incident, email:
security@securestamp.onlineFrequently asked questions
How do I install the SecureStamp add-in in Outlook?
Your administrator can deploy it from the Microsoft 365 Admin Center (Integrated Apps → Upload custom app) using the manifest URL https://securestamp.online/outlook/manifest.xml. It appears automatically in the Outlook ribbon.
What does the add-in do?
It tells you what an email is asking you to do before you act: a payment, a bank-account change, your credentials. That reading happens on your device and the message body never leaves it. As supporting evidence it verifies the sender identity (SPF, DKIM, DMARC and domain reputation), and it helps you sign the emails you send with a verifiable identity stamp.
Does SecureStamp read my email content?
Content analysis runs on-device. We do not store the body of your messages. See our Privacy Policy for details.