How to send email after booting in Lubuntu 16.10?

[darkod]

Nope... I have a HP Microserver with no monitor or keyboard and it has a script in rc.local, and it executes on each boot. It never missed even one boot since I configured it.

Double check BIOS settings because there are option to stop boot if there is no keyboard present (remains of ancient times when it was assumed you would have KB on the machine). If that option is active, the BIOS will stop your boot, not ubuntu. Check any BIOS settings that might relate to something like that.

Also, try booting it only with monitor, no KB, to check how it acts (you can at least see something on the monitor).

PS. And did you make the script executable, I believe that is necessary:

sudo chmod +x /path/filename

PPS. On the other hand, I am running ubuntu server with no gui, and you lubuntu with a gui. So it might act differently when there is no monitor and KB...

[SeijiSensei]

Reboot the server, then run

ps ax | grep postfix | grep -v grep

If that turns up empty, then Postfix isn't being started at boot. In 16.10, with systemd, you might need to run the command

sudo systemctl enable postfix

to have Postfix start up at boot though usually Postfix is automatically enabled if installed from the repositories. You can then start the server manually with

sudo systemctl start postfix

Also, you do know that 16.10 has only nine months of support, right? If you're building a server, use a release with long-term support like 16.04.