Okay to put Postfix back in?

[hhlodge]

Hi,

I had built my CentOS 5.5 box with Postfix and the XI installation replaced it with sendmail. I can't think of any reason why Nagios would care what the MTA is but want to make sure. Can I put Postfix back in? I can live with sendmail but have just grown fond of Postfix.TIA.

[mguthrie]

I would recommend taking a snapshot of your system before making a change like this. We don't have a change like this documented or tested, so you'll be somewhat on your own in making the switch. If you hit some bumps we'll do our best to point you in the right direction, but we won't guarantee it working. I know sendmail is specified in the /etc/php.ini file, and the notification commands are calling to /bin/mail, but that's probably the extent as to where I could help you ; )

[tonyyarusso]

That should be fine, yes. Postfix defines a 'sendmail' binary for backwards compatibility, so what XI looks for shouldn't be affected. It's just that XI's installation process explicitly says to install sendmail rather than having logic for "is there an MTA installed?", since it's supposed to be installed on a completely blank system and modified from there.