Topic: [local mail] s-nail + postfix
USER = your main user
usermod -aG adm USER
doas pacman -S postfix
doas rc-service postfix start
doas nano /etc/postfix/aliases
-->root : USER
doas newaliases
echo test mail localhost | mail -s "mail test" root
To read the messages
mail
or
mutt -f /var/mail/USER
rc-service
doas rc-update add postfix default