I’ll start this by saying that Exim is slightly more difficult to configure for Gmail SMTP relay than Postfix, and if you’re using Webmin there is a standard module for Postfix that makes it even easier. Finding the correct way to configure Exim on CentOS was difficult in itself and the reason for this article.

Now, if you prefer to use Exim for sending mail through Gmail this is how you accomplish it.

These instructions have been tested on CentOS 6.7 with Exim 4.84. [Read more…]