Monitoring Processing

Document created by user.oxriBaJeN4 Employee on Sep 11, 2015Last modified by user.oxriBaJeN4 Employee on Apr 2, 2019
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Before Mimecast can deliver emails, certain checks are performed, and the applicable policies need to be applied.  While these activities are being performed, emails are temporarily queued in the Processing Queue.  Once completed, emails are moved into the Delivery Queue awaiting delivery.


Typically, an Administrator will not need to monitor the Processing Queue.  Emails should only be displayed in the queue for a short time as they are processed immediately on receipt, and then moved to the Delivery Queue.  Sometimes, if larger mailshots are being sent out, emails can be queued in the Processing Queue due to the increased processing required.

Mimecast will not process more than 10 identical emails coming from the same sender going outbound to different recipients at one time, as this would resemble a mailshot, and the priority of these emails is automatically lowered.

Using the Processing Queue


To access the Processing Queue

  1. Log in to the Administration Console.
  2. Click on the Administration toolbar button. A menu drop down is displayed.
  3. Click on the Monitoring | Processing menu item.


The following information is provided:

FromEmail address of senderDetails of the sender
ToEmail address of recipientDetails of the recipient
Email Direction

Arrow indicator Inbound Arrow indicator outbound


Show the direction of the email (inbound or outbound)
Status and InfoQueued for ProcessingApplicable checks and policies are being applied
TryNumeric value between 1 and 31The number of retry attempts for this email
SizeNumeric value in KilobytesSize of the email message
StatusLocked (Red Indicator)The email is currently locked
Delayed (Orange Indicator)The email is queued for processing
Normal (Green Indicator)The email is awaiting the next retry interval


The Processing queue also provides options to Retry, Reject or Bounce an email, however these should be used with caution, and with the assistance of Mimecast Support.


For a single entry, right-click on the email (or click on the context menu icon) and select the desired action, or for multiple entries, use the check box next to the message, and select from the action icons:


Retry Selected ItemsForces a manual retry of the emailEmail delivery is immediately retried, and the retry count increases by one
Reject Selected ItemsRejects the email

Email is rejected and removed from Delivery Queue. A delivery failure notification is sent to the internal sender of the email.

Early Bounce Selected ItemsEarly bounces the email

Causes the delivery attempts to be increased to a maximum of 30 attempts, causing delivery to fail. A delivery failure notification is sent to the internal sender of the email, but the message is recoverable as it has been accepted.

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