Regards Zimbra community.

Currently performed a learning process libexec directory files, I'm monitoring the spam activity on my server using the file "zmdailyreport". The system has notified me an hour periods over 7000 number of recipients per SMTP messages, and when I run the daily report file not all emails sent evidence. Currently throws me the following two "Top Senders":


Will mean from = <>?
The domain not for my domain. Because it appears in the report?

Thanks in advance for your cooperation