I have a Joomla 2.5 website, using the "RSForm! Pro" extension for the contact form. The website is running on a CentOS 6 server with a VMWare environment. We are using Postfix / SMTP for email delivery. Here is the problem: I don't get a connection from the Joomla website to the SMTP host, and so no emails will be delivered (error message: "The following from address failed:")
I think someone of you with Postfix/PHP/Joomla/Linux experience should be able to fix this within a few minutes.