HubSpot Free Email Marketing - Powerful drag and drop email marketing in the HubSpot CRM
Mailzak - Give a boost to your #EmailMarketing
Email Marketing: A Beginner's Guide - Master email marketing with these 3 short ebooks from Drip.
SendOut - Affordable email marketing for bloggers and influencers
Email Marketing Academy from MailerLite - Learning platform for email marketing expert certification
Mailblast - Email marketing on a budget using Amazon SES