Fernando, you can see that mail at /var/mail/root
Hopefully you only get some notification mails from a default root user to your admin email account.
In my case, I'm struggling to fix a loop with mails with this error message "Our system has detected that this message does not meet IPv6 sending guidelines regarding PTR records and authentication."
It seems like wordops can not send the "New WordPress Site" messages to my gmail account.
If anyone can help with this issue, it will be appreciated.