to shut down a running debian GNU/linux system, you should not restart the computer using the reset button on the front or back or simply switch it off. debian GNU/linux should be shut down in a controlled manner, otherwise files may be lost and/or hard drives may be damaged. if you are using a graphical desktop environment, there is usually a "logout" menu option that allows you to shut down (or restart) the system.

alternatively, you can use the key combination ctrl+alt+del. if these key combinations don't work, the last resort is to log in as root and enter the appropriate commands. use reboot to reboot the system. use halt to halt (stop) the system, but without turning off the power. to shut down the machine, use poweroff or shutdown -h now. The systemd init system provides commands that provide the same functionality, e.g. systemctl reboot or systemctl poweroff.

this guide is intended for communication with an internal e-mail server!

Install the msmtp package

configure

testen

send mail mit PHP

change the sendmail_path option in your php.ini

sendmail_path = "/usr/bin/msmtp -C /path/to/your/config -t"

remember to set read and write permissions for both /usr/bin/msmtp (7777) and your config file (0777)

restart apache when done!

test

create a php file for this, don't forget the PHP opening and closing!

mail("your@email.com", "Test email from PHP", "msmtp as sendmail for PHP");