What are the differences between sending emails using an API and SMTP?
Simple Mail Transfer Protocol (SMTP)
SMTP is a standard protocol for transferring email. It sends emails between mail servers or from a client to a mail server. SMTP is the fundamental protocol for sending email over the Internet.Application Programming Interface (API)
An API is a method of sending emails by calling the HTTP/HTTPS interfaces provided by Direct Mail.
Use SMTP for more customization options.
Use SMTP if your emails contain attachments.
Use the API to integrate with systems that require an API or for high call frequencies.