Mailjet

Mailjet is an all-in-one solution to send, track and deliver transactional, notification and marketing emails. Engage, analyze and react with your client base through email. Get started by using the Mailjet zap to synchronise contacts from your favorite eCommerce, CRM or other SaaS tools to your Mailjet contact lists. For users on API version 3 or higher.
Connect Mailjet with KFactors on Zapier