Set up DMARC and see who's sending email using your brand's domain.

What does a CORS error mean?

A CORS error suggests that you're running your API call to Postmark on the client-side. To prevent you from leaking your API token, Postmark does not allow that. There would need to be a server-side component that calls and sends the message through Postmark.

Last updated June 11th, 2020

Still need some help?

Our customer success team has your back!