Preface: I'm using Jessie Lite on a Raspberry Pi.
In crontab, the default text says
Output of the crontab jobs (including errors) is sent through email to the user the crontab file belongs to (unless redirected).
When I created this user, I didn't enter an email address (and don't recall being asked to enter one), so where and how can I enter one for this user?
The statement above implies to me that it is possible to use an email address associated with my user account somehow to send an email (instead of having to add a MAILTO environment variable with an email address to the crontab file).