SMTP

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Prerequisites

$ dnf install -y postfix mailx

Configuring Hostnames

Edit /etc/hosts:

127.0.0.1 example.com

Configuring Postfix

Edit /etc/postfix/main.cf:

inet_interfaces = localhost

inet_protocols = all

Start Postfix

$ systemctl start postfix

Sending a Mail

$ mail -s "Test" root@fedora.localdomain < /dev/null