SecureStamp checks who sent the email and analyzes the message on your device, warning you about suspicious links, attachments and scams before you click.

Yes. Free includes basic protection and trust checks. SecureStamp Personal costs less than a coffee per month.

How does email verification work?

The plugin checks the sender and the message. It shows a simple result first: looks trusted, be careful or high risk. Technical details remain available when needed.

Does SecureStamp access my email content?

Your email text never leaves your device. Message analysis runs locally and only anonymous risk signals may be sent.

How do I register my company with SecureStamp?

Create an account at securestamp.online, add your domain, and complete DNS verification with a TXT record. The process takes less than 15 minutes. Once verified, your emails show the green indicator to all plugin users.

Does SecureStamp protect against phishing?

Yes. SecureStamp detects suspicious domains, typosquatting (domains mimicking real brands) and blocked senders, alerting users before they interact with potentially fraudulent emails.

What is SecureStamp Signal?

SecureStamp Signal verifies whether a number, handle, link or messaging channel belongs to a registered brand. It returns a verifiable verdict and a signed Trust Receipt.

What is Confidential Mail?

Confidential Mail enables end-to-end encrypted messages between verified identities. Enterprise plans can combine quorum-controlled recovery and post-quantum protection.

What do the webmail and Outlook plugins do?

The plugins install in your browser or email client and automatically verify every email as you open it. They show a trust indicator next to the sender without any manual action required.

🔒 Confidential Mail

This message is encrypted

Someone sent you an end-to-end encrypted email with SecureStamp. The content travels protected: nobody in transit — not even SecureStamp — can read it. It is decrypted only on your device, with your key.

How to read it

1 · Install the SecureStamp add-in
In Gmail (Chrome extension) or Outlook / Microsoft 365 (add-in). The message decrypts automatically when you open it.
2 · Activate Confidential Mail
From the add-in, generate your key pair once. Your private key stays on your device; SecureStamp only stores your public key.
3 · Open the message
Come back to this email with the add-in active: you will see the decrypted content inside the SecureStamp panel.

1 · Unlock your key

Upload your recovery file (.json) and enter your passphrase. Everything runs on this device — the file and passphrase are never sent to SecureStamp.

2 · Paste the encrypted message

Paste the confidential email content (the whole body or the encrypted block) and decrypt it locally.

To verify the sender signature. Requires being signed in to SecureStamp.

🔒 Decryption happens 100% in your browser. Nothing is sent to any server.

SecureStamp cannot read this message

Encryption is end-to-end (ECDH P-256 + AES-256-GCM). The decryption key never leaves your device or your organization. If you lose your key and your recovery file, the content cannot be recovered — that is the guarantee.

Get the add-in Go to my dashboard

Note: encryption protects the message body and attachments, not transport metadata (the mail server still sees sender, recipients, subject and date).