config external smtp to setup debian to send mail

example.sh

echo "Testing msmtp from ${HOSTNAME} with mail command" | mail -s "hi there" zital@riseup.net

install.sh

#!/bin/bash
apt-get install msmtp msmtp-mta mailutils
apt-get install bsd-mailx

mail.rc

# /etc/mail.rc <- remove this line
set ask askcc append dot save crt
ignore Received Message-Id Resent-Message-Id Status Mail-From Return-Path Via Delivered-To
set mta=/usr/bin/msmtp

msmtprc

# /etc/msmtprc
defaults
port 587
tls on
tls_trust_file /etc/ssl/certs/ca-certificates.crt
account isp
host mail.riseup.net
from zital@riseup.net
auth on
user zital
password 1234567890
account default: isp
aliases /etc/aliase

Eskerrak: https://moritzvd.com/email-with-smtp-debian-ubuntu/