Credentials

Postmark API token

Missive uses the same configuration as postmark-rails. Follow the postmark-rails configuration instructions to set up your Postmark API credentials, e.g.:

postmark_api_token: your-server-api-token

Webhook secret

The webhooks endpoint reads its shared secret from Rails.application.credentials.postmark.webhooks_secret:

postmark:
  webhooks_secret: a-long-random-string

Generate one with bin/rails secret, and set the same value in the X-Postmark-Secret custom header of your Postmark webhooks.

DANGER

Always set postmark.webhooks_secret in every environment where the engine is mounted.