System mail

• /etc/msmtprc

account default
from <hostname>@ejik.org
host smtp.yandex.ru
port 465
auth on
tls on
tls_starttls off
tls_trust_file /etc/ssl/certs/ca-certificates.crt
user <smtp-user@example.net>
password <password>

aliases /etc/aliases

• /etc/aliases

default: @ejik.org

• Add something like

set from="user <user@example.org>"

to the end of /etc/nail.rc