portsnap question

[Adam Stroud]

I have a question on what the handbook says about portsnap.  According 
to the handbook:


"Adding the following line to /etc/crontab will cause portsnap to update 
its compressed snapshot and the INDEX files in /usr/ports/, and will 
send an email if any installed ports are out of date:

0 3 * * * root portsnap -I cron update && pkg_version -vIL="

My question is what part of that crontab entry sends an email?  Is it a 
function of cron, because I didnt see any reference to an email getting 
sent in the portsnap or pkg_version man page.

Thanks
A