Process Tracking Emails

I have several websites made in WordPress. WordPress try to update itself regularly. When it happens, I received an email from the server for every website of this type:

Code:

Time:  Tue Sep 22 08:30:35 2015 +0200
PID:  5733 (Parent PID:3407)
Account: userxxx
Time active:  76 seconds
Executable:
/usr/bin/php
Command line (often misrepresented exploits):
/usr/bin/php /home/userxxx/public_html/wp-cron.php
Network connections of the process (if any):
tcp: 37.187.128.59:54909 -> 37.187.128.59:80
...

How can I avoid receiving these emails?

Thank you so much.

Regards.

 

Thank you so much.
Best regards.