What command are you using to send emails?
In the snippet you provided, you used this command:
- echo ‘Run this command every minute’
echo command is used to output the message to the terminal output. To send it as a email, you need to pipe it to some email client.
The exact steps are depending on the setup you have, i.e. how did you set up your email server.
For example, if you’re using Postfix (e.g. set up by following the How to Install and Configure Postfix as a Send-Only SMTP Server on Ubuntu 16.04 tutorial), you can use command such as:
- echo ‘Run this command every minute’ | mail -s 'subject' $MAILTO
If you’re using the correct command in your crontab file, try to execute it like a normal command, in your terminal. If you’re a new DigitalOcean user, it could be that SMTP protocol needed to send emails is disabled for your account. In that case you would have to open the support ticket to request to get it enabled for your account.
Also, maybe it could be useful to check your logs. Check does
/var/log/syslog) contains some useful logs.
Postfix is a *mail transfer agent* (MTA), an application used to send and receive email. In this tutorial, we will install and configure Postfix so that it can be used to send emails by local applications only — that is, those installed on the same server that Postfix is installed on.