Upcado - Super easy to use Messenger Marketing tool for your business
HubSpot Free Email Marketing - Powerful drag and drop email marketing in the HubSpot CRM
Job Promotion Course - Step-by-step promotion guide in a free 7-day email course
Email Marketing: A Beginner's Guide - Master email marketing with these 3 short ebooks from Drip.
Email University - A free course to help you become a better marketer
Email Marketing Academy from MailerLite - Learning platform for email marketing expert certification