How are your emails defined ?
Is it Sendmail's Inbox or Postfix Maildir or something else ? (where are your email messages stored
Where do you keep the settings for emails,
I am receiving lot's of cronjob command reports on default mail adress....
doesn't really help to find a solution.
What is your default email address (mask your real address if you post it)?
Root , like "email@example.com" ?
or is it domain default (like: "firstname.lastname@example.org" ) if you're serving multiple domains ?