R provides a few packages for sending emails via SMTP, Web API, and Microsoft Outlook. Check out the most popular ones, such as mailR, gmailR, and others.
SMTP relay is the process of routing emails to the proper destination SMTP server. Check out several options to test your SMTP server for relaying
Quick and comprehensive overview of Amazon SQS, its capabilities, pricing as well as testing examples. After reading this tutorial, you will be able to set up Amazon SQS and decide if it is a good fit for your further projects and integration with other AWS services.