We are building a web app and will need to send emails on a frequent basis using php's mail() function. We are using it to send mails when e.g. a user signs up for the app, when a client has a new product order, and so on.
What do we install best on our CentOS server to make this happen? I've read a lot about sendmail vs. postfix vs. other packages to use as an MTA but couldn't figure out what I need.
We will not run mail boxes for our users, we only want to send out email from our web app, not receive any emails (we are using google apps for that)
We are looking for a solutions that is easy to setup and maintain