Email POSTFIX and SENDMAIL? Do I need them?

Hi I was working on the persistent custom config at /etc/centminmod/custom_config.inc.

If I used 3rd party to send email, can I set up in the file like this:

PHP:

SENDMAIL_INSTALL='n'         # Install Sendmail (and mailx) set to y and POSTFIX_INSTALL=n for sendmail
POSTFIX_INSTALL=y            # Install Postfix (and mailx) set to n and SENDMAIL_INSTALL=y for sendmail

Is '' missing for POSTFIX_INSTALL? I copy this directly from github. Thanks.

 

Ok. I just try the custom config above. How to check if Postfix is installed and enabled or not? Thanks.

 

I added the code below in /etc/centminmod/custom_config.inc but time zone is still not working with new Wordpress install? Something missing? Thank you so much!

PHP:

ZONEINFO=Asia/Taipei  # Set Timezone
LETSENCRYPT_DETECT='y' # Use acmetool.sh

 

Postfix is Running.
Thanks.