Resends a copy of the campaign to recipients who didn't open the original. Optionally, a different subject line can be used to improve open rates.
The original campaign must have been sent at least 24 hours before resending and must have recipients who didn't open the email. Can only be called once per campaign.
You can only call this method when authenticated as a Wix app or Wix user identity.
This method doesn't return any custom errors, but may return standard errors. Learn more about standard Wix errors.