setup nullmailer

draft

install

    apt install nullmailer
ls -lF /usr/sbin/sendmail

setup

cd /etc/nullmailer/

    echo DOMAIN.TLD > defaultdomain

# from
echo root@DOMAIN.TLD > adminaddr

    vi /etc/nullmailer/remotes

# --either-- casual smarthost
    mx.nethence.com smtp --starttls

# --or-- SASL
    mx.nethence.com --daemon -p 465 --ssl --user=USER-HERE --pass=PASSWORD-HERE

ready to go

    systemctl restart nullmailer.service
    systemctl enable nullmailer.service
    systemctl status nullmailer.service

acceptance

see null-mailers

resources

https://troubleshooters.com/linux/nullmailer/

https://wiki.debian.org/nullmailer

https://wiki.archlinux.org/index.php/Nullmailer

https://web.archive.org/web/20190609212809/https://metzlog.srcbox.net/2012/11/nullmailer-with-starttls/

https://unix.stackexchange.com/questions/252179/how-to-enable-secure-authentication-ssl-tls-starttls-in-nullmailer-1-0-5-and

https://unix.stackexchange.com/questions/1449/lightweight-outgoing-smtp-server