Check on Send - Chrome Web Store
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Check email recipients before sending

Check on Send allows you to configure your Gmail account to help automatically warn you before potentially sending an email to unintended recipients. Targeted at G-Suite business users to help protect sensitive information from being accidentally disclosed to the wrong people. Check on Send allows you to flag some domains as safe while treating all others as untrusted for which you will be prompted to confirm before sending an email. Recipients are dynamically colour coded as you add them to your email draft, and you can also configure specific colour mappings to help visually spot particular untrusted domains before you click send. If you have signed into Google using your G-Suite account you can also benefit from Check on Send syncing your settings against your profile across multiple devices. Please note that you will need to refresh your browser for any active Gmail tabs to update when first installing or enabling/disabling the extension. I developed this extension given how easily one can accidentally pull in the wrong recipient with auto-complete, and following feedback from colleagues that something like this would be useful. For any comments and feedback please email PRIVACY NOTICE: Check on Send does not collect any personal information, nor does it read or track any information about the content of your emails. The only tracked information is limited to the trusted domains you specify and the first 50 untrusted email domains as these are automatically assigned unique colour mappings. This information is only stored against your own Google account extension profile using the Google Sync API managed and hosted by Google. Check on Send does not otherwise transmit this information beyond your browser.

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  • Version
  • Updated
    January 17, 2021
  • Offered by
    Check on Send
  • Size
  • Languages
    English (UK)
  • Developer
  • Non-trader
    This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.


The developer has disclosed that it will not collect or use your data.

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes


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