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No technology is perfect, and Courier believes that working with skilled security researchers across the globe is crucial in identifying weaknesses in any technology. If you believe you've found a security issue in our product or service, we encourage you to notify us. We welcome working with you to resolve the issue promptly.


IMPORTANT : Please DO NOT send messages via our in-app support mechanism (Intercom) to test for XSS issues. This has been tested many times, is provided by a 3rd-party (Intercom), and creates extra work for our support team.

Also, please do not submit tickets about DMARC.

While researching, we'd like to ask you to refrain from:

  • Denial of service
  • Spamming
  • Social engineering (including phishing) of Courier staff or contractors
  • Any physical attempts against Courier property or data centers
  • Attempting to spoof emails sent from trycourier.com

Disclosure Policy

  • Let us know as soon as possible upon discovery of a potential security issue, and we'll make every effort to quickly resolve the issue.
  • Provide us a reasonable amount of time to resolve the issue before any disclosure to the public or a third-party.
  • Make a good faith effort to avoid privacy violations, destruction of data, and interruption or degradation of our service. Only interact with accounts you own or with explicit permission of the account holder.

Safe Harbor

Any activities conducted in a manner consistent with this policy will be considered authorized conduct and we will not initiate legal action against you. If legal action is initiated by a third party against you in connection with activities conducted under this policy, we will take steps to make it known that your actions were conducted in compliance with this policy.

Thank you for helping keep Courier and our users safe!

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This policy crawled by Onyphe on the 2020-07-21 is sorted as bounty.

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