Email-Fraud Protection Tool



Email-Fraud Protection Tool

Easy installation &
quick start

As a Chrome Extension, it provides easy installation and simple usage: no need to change Gmail usage habits

Compare emails &
prevent fraud

Email Receivers can use the Verify button to compare any differences with the original email helping in preventing fraud

Preserve evidence permanently

Right before the email is sent, a digital fingerprint is generated and uploaded to Blockchain; this allows for verifying original email's authenticity


  • Website
  • ChkSender is a browser extension allowing Webmail email recipients to verify the email sender’s origin and the integrity of the email content, by allowing them to mark any email as fraudulent based on comparison with original email, all without forcing the users to change their usage habits. As for senders, it also allows them to preserve email evidence on blockchain and to send encrypted emails containing confidential information.

    ChkSender helps users validate email integrity by verifying sender's domain information.

    [ Sender | Store Evidence ]
    ・When transmitting crucial emails, this one-click action saves & sends out the email; permanently stores its digital fingerprint on blockchain; plus records its timestamp.
    ・With confidential content protection, you may send out the email after encrypted it by a set of password.
    ・In case of any future disputes such as remittance transfer issues, the stored evidence can be used as self-protection in court.

    [ Receiver | Verify Evidence ]
    ・Received email is verified in one click confirming email's authenticity, including if the subject, sender, recipient, mail body & attachment file names match the original.
    ・Received ChkSender logo can be clicked to decrypt and view the original email's details.
    ・In case of sender's email address being tampered with, the difference with the original sent-email is clearly shown, duly preventing falling prey to hacker's traps. ・User may add suspected sender's email into personal whitelist.