Integrating Doppler Email Marketing with Unbounce is very easy.
Follow these steps to easily integrate your Unbounce forms to Doppler: https://help.fromdoppler.com/en/how-integrate-doppler-unbounce
Once your contact email is sent to Doppler, you will have it available on your Lists to receive Email Marketing & Automation Campaigns.
Any question you can write to support@fromdoppler.com.