Testing Postfixīefore putting something into production, testing it in a dev environment is always a good idea. It’s important to only use local network addresses to avoid unauthorized users using your mail server for malicious activity, resulting in your server and addresses being blacklisted. The list provided with mynetworks should only contain local network IP addresses, or network/netmask patterns that are separated by commas or whitespace. 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.
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