There are a few reasons why this may be taking place: If you are on the Grow plan, your email may have become un-synced and will need to re-sync your email by going to the Email tab and clicking on the re-connect email button. If you are on Start or Develop, you won't be able to send campaigns or trackable email as this feature is reserved for our Grow plan users. Please reach out to customercare@pipelinecrm.com if you are interested in trialing our Grow plan.