SendGrid is the leader in transactional email delivery. Our cloud-based bulk email service replaces in-house email infrastructure so customers don’t have to build, scale, and maintain their own email systems.
A suite of clean IP streams, a host of delivery and reputation features, and a team of 30+ deliverability experts focused on your sending.
A global, custom-built MTA architected for the cloud and supported by a redundant, self-hosted datacenter infrastructure.
Real-time, Customizable Analytics
Create reports based on timeframe, email category, ISP, geography, and device-type.
24/7 dedicated email experts ready to answer any and all questions.
Source : https://sendgrid.com