# Email fails domain authentication
Error message seen, sometimes in conjunction with an email going in to junk email.
**'This email has failed its domain's authentication requirements. It may be spoofed or improperly forwarded!'**
##### How you would notice
You've drafted your email and send a test to your own email (protonmail.com is particularly sensitive to this error), and you have this error message shown above. Your test email may have also gone into your Junk/Spam folder
##### Reason
Something wrong with the reply-to email. In particular [proton.me email addresses are not recommended](https://rebeltoolkit.extinctionrebellion.uk/link/968#bkmrk-page-title)
##### Temporary fix
Try sending another test with noreply@extinctionrebellion.uk in the 'Reply-to Email' field. If this works - then that is a sign that the system (or the internet!) doesn't like your reply-to email address.
##### Permanant fix
Use a different reply-to email address. If you are part of an XRUK central team, campaign group or local group you can [apply for an xxxx@extinctionrebellion.uk email address](https://rebeltoolkit.extinctionrebellion.uk/link/1063#bkmrk-page-title) which should work much better for you as we have registered 'extinctionrebellion.uk' with Action Network as a valid 'domain' to stop this kind of problem.