Installing PowerMTA 6.0r3 involves preparing your Linux environment (typically CentOS/RHEL or Ubuntu/Debian), installing the software package, and configuring the basic service parameters. 1. System Preparation
(Note: If the installer outputs any errors regarding missing dependencies, run yum install -y <package_name> or apt install -f to resolve them.)
For RPM-based systems (RHEL/CentOS):
PowerMTA can run with SELinux enforcing, but it requires custom policies. To avoid initial delivery issues, set SELinux to permissive mode: