Dovecot won’t start?

I have run into a problem after a fresh install of CentOS 7, Webmin, Vitualmin, Postfix and Dovecot. It seem that the hostname was not configured properly. Here is what I did to fix this problem.

Locate and edit this file:
/etc/hostname

Make sure that the hostname is set to localhost.localdomain.(YOUR_DOMAIN_NAME)

So it will be like this:
localhost.localdomain.mydomain.com

Save and start Dovecot!

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