The Mailjet Go SDK by Mailjet allows to communicate with the API to implement email marketing features into applications. To start the project, developers need a Key, an API secret, and Go installation. Available example to send email with recipient, subject, and text part.
Email marketing service provider MailChimp announced last week a new $1 million dollar fund for startups building products that integrate with the service's MailChimp API. MailChimp's program is somewhat unique in that they won't be asking for equity from the companies they fund. It's a pretty attractive deal for prospective partners and a trail-blazing move for a platform in an increasingly competitive industry.