August 2017
Intermediate to advanced
278 pages
8h 53m
English
Content preview from NGINX Cookbook
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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 ...
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