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Message Size Exceeds Fixed Maximum Message Size Error in Health Log

Symptoms​

You've encountered one of the following errors in your Health Log:

Netwrix Auditor was unable to send Activity Summary to %email_address%. 
Error: SMTP Exception: The server rejected the message: %message%
Message size exceeds fixed maximum message size.  
Check your SMTP settings. Make sure the Exchange server is up and running and recipient's mailbox is accessible.
Netwrix Auditor was unable to deliver the subscription %subscription_name% due to the following error: 
The following subscriptions could not be sent to the recipient %email_address%: 
Error: Exceeded storage allocation. The server response was: %message%
Message size exceeds fixed maximum message size.

Causes​

  • Size of the attached report exceeds the maximum message size.
  • Your Exchange server is affected by a connectivity issue.

Resolutions​

  • Activity Summaries in large environments may exceed the maximum message size.

    1. In the main Netwrix Auditor menu, select Monitoring plans, select the affected monitoring plan in the left pane, and click Edit.
    2. In the right pane, click Edit settings under the Monitoring plan section.
    3. In the left pane, select Notifications.
    4. Check the Compress attachment before sending checkbox, and click Save.

  • Subscription reports in large environments may exceed the maximum message size.

    1. In the main Netwrix Auditor menu, select Subscriptions, select the affected subscription, and click Edit.
    2. In the left pane, select the General tab.
    3. Under the Specify delivery options, select CSV in the drop-down File format list.
    4. Click Save to save changes.

  • Restart your Exchange server to verify the issue is not related to the server.