Postfix¶

sudo apt update
sudo apt install postfix mailutils

sudo nano /etc/postfix/main.cf

myhostname = mail.example.com
mydomain = example.com
myorigin = $mydomain
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
home_mailbox = Maildir/

smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes
smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination

sudo systemctl restart postfix
sudo systemctl enable postfix

echo "Test Email" | mail -s "Test Subject" user@example.com

sudo tail -f /var/log/mail.log