This SDK is a wrapper for SendGrid in Go. It is a library to simplify the process of using SendGrid's X-SMTP API. The SendGrid SMTP API allows developers to specify custom handling instructions for e-mail. This is accomplished through a header, X-SMTPAPI, that is inserted into the message. The header is a JSON encoded list of instructions and options for that email. SendGrid’s platform, tools, and expert services team provides a way for developers and marketers to craft, segment, test, and deliver all of their email and includes: purchase confirmations, password reset instructions, an upcoming sale, or a nurture campaign and more. It is a customer communication platform that delivers 35+ billion emails each month.
APIs are now an integral part of any product offering. Developers have continuously pushed the envelope in terms of the features that they want from APIs and API companies have responded from time to time, paying attention to design, reducing the amount of response data and also using performance tuning tools for APIs. In the light of that, Google expanded a feature that it introduced a year back: partial responses and updates.