Book Image

NGINX Cookbook

By : Tim Butler
Book Image

NGINX Cookbook

By: Tim Butler

Overview of this book

NGINX Cookbook covers the basics of configuring NGINX as a web server for use with common web frameworks such as WordPress and Ruby on Rails, through to utilization as a reverse proxy. Designed as a go-to reference guide, this book will give you practical answers based on real-world deployments to get you up and running quickly. Recipes have also been provided for multiple SSL configurations, different logging scenarios, practical rewrites, and multiple load balancing scenarios. Advanced topics include covering bandwidth management, Docker container usage, performance tuning, OpenResty, and the NGINX Plus commercial features. By the time you've read this book, you will be able to adapt and use a wide variety of NGINX implementations to solve any problems you have.
Table of Contents (14 chapters)

NGINX as an SMTP load balancer

As demonstrated in our previous recipe, NGINX can do pure TCP load balancing. Further to this, there are some protocol specific implementations, which have some specific items to enhance the implementation.

Simple Mail Transport Protocol (SMTP) is the standard protocol used to send and receive email at a server level. The most popular SMTP servers for a Linux platform include Postfix, Exim, and Sendmail, with Exchange being the most popular for Windows.

Load balancing SMTP can help to distribute the sending and receiving of email, especially if it's a high-volume environment such as an Internet Service Provider (ISP). By running multiple servers, you can distribute the sending aspect as well as provide some fault tolerance when systems have issues.

While NGINX has a specific mail module, unfortunately, this does not have load balancing capabilities...