install_postfix_office365_relay

#!/bin/bash

echo This will install postfix and use an office365 account as a relay for outgoing emails
read -p "press enter to continue"

echo what is your office365 email address?: ; read email_address
echo what is your office365 email password?: ; read email_password
echo where should we send a test email?: ; read email_recipient

echo installing postfix
echo "postfix postfix/mailname string $(hostname --fqdn)" | debconf-set-selections
echo "postfix postfix/main_mailer_type string 'Internet Site'" | debconf-set-selections
apt install -y postfix mailutils

echo configuring postfix
sed -i -e '/relayhost/d' /etc/postfix/main.cf
sed -i -e '/inet_interfaces/d' /etc/postfix/main.cf
echo "/.+/ $email_address" >> /etc/postfix/sender_canonical_maps

cat <<EOT >> /etc/postfix/main.cf
smtp_sasl_auth_enable = yes
inet_interfaces = 127.0.0.1
smtp_tls_security_level = encrypt
relayhost = smtp.office365.com:587
smtp_sasl_security_options = noanonymous
sender_canonical_maps = regexp:/etc/postfix/sender_canonical_maps
smtp_sasl_password_maps = static:$email_address:$email_password
EOT

echo restarting postfix
systemctl stop postfix
systemctl start postfix
systemctl status postfix

echo sending test email
echo "body test" | mail -s "subject test" $email_recipient