• Monitoring Information

    The following pages can be used to monitor email flow: Monitoring Message Flow: This page provides viewers and queues that Administrators can use to monitor email flow. Queue Retention Periods: Mimeca...
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  • Mimecast SMTP Error Codes

    4xx Error Codes 5xx Error Codes When messages are sent or received between two email servers or Mail Transfer Agents (MTAs), the communication uses a series of numeric SMTP codes. These codes are always in pa...
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  • Queue Retention Periods

    Mimecast tables, queues, and viewers display information on email data for a specific length of time. A summary of these is displayed below:   Account Menu Archive Menu Gateway Menu Message Ce...
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  • Troubleshooting Email Delivery

    Troubleshooting Scenarios Outbound Email Inbound Email Proving Message Delivery See Also... Messages not being delivered, or being delayed in delivery, frustrates end users causing them to ra...
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  • Monitoring the Delivery Queue

    Delivery Queue Uses Accessing the Delivery Queue Notifications Pausing Inbound Deliveries See Also... We attempt to deliver messages to the recipient for up to four days (96 hours) or 30 retry att...
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  • Monitoring Rejected Messages

    Using the Rejection Viewer Common Rejection Types and Resolutions Troubleshooting Failed Email Delivery See Also... We reject messages that match certain criteria. For example they contain a...
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  • Managing Blocked / Stripped and Linked Attachments

    Considerations Viewing Messages with Stripped Attachments Releasing Messages and Attachments Released Attachments Log Large File Send Attachments See Also... This guide provides an overview of...
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  • Monitoring Processing

    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...
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  • Disabling SMTP Fixup on Cisco Firewalls

    Cisco firewalls have a program called SMTP Fixup. This program is known to cause problems with mail delivery, and we recommend disabling it. Below is an article from Symantec that covers the problems with SMTP Fixup: ...
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  • Message Recovery Options

    Applies To... Accepted Messages Archive Messages Recovering Archive Messages Exporting Bulk Archive Messages  Replaying Inbound Messages Sync & Recover Mailbox Folder Replicat...
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  • Releasing Emails and Attachments

    To release an email or attachment: Logon to the Administration Console. Click on the Administration toolbar menu item. Select the Monitoring | Attachments menu item. Right click on the message to be released....
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  • Administration Console: Monitoring Data Leak Prevention

    This guide describes how to monitor data leak prevention by accessing log files.   Applies To...  Administrators responsible for understanding why content examination policies have been triggered. ...
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  • Backscatter

    We don't use services like Bounce Address Tag Validation (BATV) address validation, as with our security checks it's unnecessary and difficult to configure in combination with greylisting. Ins...
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  • Administration Console: Monitoring Impersonation Protect Logs

    This guide describes how to access impersonation protection log files.   Applies To...  Administrators responsible for understanding why a potential impersonation protection attack has been triggered.  ...
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  • Monitoring Secure Messaging

    Applies To... Walkthrough Viewing a Log File Filtering the Log Files See Also... This guide describes how you can display the details of messages that have been sent or received via Secure Messagi...
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  • The System Queue

    The System Queue displays all system notification messages that are currently being processed by Mimecast. These notifications include delivery status notifications and challenge-response messages. Typically notificat...
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  • Non-Delivery Report (NDR)

    A Non-Delivery Report (NDR) or ‘bounce message’ is a report generated by the mail server to inform the sender that the email delivery was not successful.  There are many reasons why a sender will rece...
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  • Policy Based List (PBL) Rejects Outbound Email

    Recently, certain Internet Service Providers (ISP's) have started enforcing their own Acceptable Use Policies. This can cause certain issues for those Mimecast customers using these ISP public IP address blocks.  ...
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