When the Zimbra Logger package is installed, a daily mail report is automatically scheduled in the cronntab. This report is sent daily to the administrator's mailbox.
The Zimbra daily mail report includes the following information:
Total number of messages that moved through the Zimbra MTA
Average delay in seconds for message delivery
Errors generated from the Zimbra MT Postfix logs
Most active sender accounts and number of messages
Most active recipient accounts and number of messages
Total number of bounced deliveries
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