mynetworks declares a list of trusted remote SMTP servers that can relay through the server, like this:.mail_spool_directory declares the directory where mailbox files are placed, like so:.mydomain declares the domain that is actually handling mail, like this:.Hostnames normally have prefixes in them, like this: myhostname declares the mail server’s hostname.Let's go over a few you may see the most when setting up the service, and when needing to troubleshooting it: Within the configuration file, there are many options that you can add, some of them more common than others. The main configuration file for the Postfix service is located at /etc/postfix/main.cf. All of the options you need for the service are located in /etc/postfix. If the previous command shows that the RPM is not installed, you can install the Postfix RPM with the following (on yum-based distros): $ yum install -y postfixĪfter Postfix is installed, you can start the service and enable it to make sure it starts after reboot: $ systemctl start postfixĪfter Postfix is installed, you can start configuring the service to your liking. To check on RPM-based distros, use this command: $ rpm -qa | grep postfix It’s always helpful to check if something is there before getting to work. A good habit to have is to check and see if the software is installed on the server already. How well do you know Linux? Take a quiz and get a badgeīefore beginning to install, first things first.Linux system administration skills assessment.A guide to installing applications on Linux.Download RHEL 9 at no charge through the Red Hat Developer program.
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