Hello,
I run zmdailyreport and it is showing, under "top 50 Senders by message count", the top sender as zimbra@<host>.<domain>. There is no such user on the system.

Today it was 950 mails which is 10x more than the next, valid entry.

Where are these mails being sent from and how can I stop them? What is this "zimbra" user account?

Thanks