Links look like x-webdoc://....

This is a known issue with Apple Mail. Make sure that your links start with https:// or http:// and they should work fine.

API (400-level error)

The first place to start is to check the body of the response. It will contain a JSON object with a message property that will give you more information about the error. Here are common reasons that the API might return with a 400-level error:

  • Using the API without a verified domain.
  • Trying to use the API for a transactional email without a published email message.
  • Missing a required parameter: transactionalId, email, or dataVariables.
  • Missing a data variable that is required by the email message.