Sendgrid is a great tool for program driven emails. The clear and comprehensive documentation walks you through every step, and the intuitive API makes crafting and sending emails a breeze.

If the recipient has a different domain, SMTP communicates with the recipient's domain name server (DNS) for delivery, handling network issues by queuing or returning undelivered messages. SendGrid is a cloud-based SMTP service that helps businesses handle multiple, large and bulk emails.

SendGrid (also known as Twilio SendGrid) is a Denver, Colorado-based customer communication platform for transactional and marketing email.

Twilio SendGrid designed Marketing Campaigns so that marketers and developers alike can create the best marketing emails possible. With all emails sent from the same platform, you eliminate the need to pull data from multiple places while also making your overall email program that much more streamlined.