Configuring a Reputation Definition

Document created by user.oxriBaJeN4 Employee on Sep 12, 2015Last modified by user.oxriBaJeN4 Employee on Jun 13, 2017
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This guide describes how to configure a reputation definition that can be applied to a reputation policy.


Applies To...


  • Administrators responsible for configuring definitions and policies.




You do not have to create a reputation definition as, by default, all block lists and reputation checks are applied to inbound emails with a count of 1. However reputation definitions provide administrators with granular control over the reputation based spam detection technologies we use as part of the default security stack. For example, some of these checks can be excluded, or their sensitivity decreased. You can:

  • Deactivate one of the default block lists to ensure that certain messages are allowed through.
  • Apply stronger hit rates before a message is rejected based on reputation.
If the message has been specifically permitted via an Auto Allow or Permitted Senders policy, this overrides any reputation definition.

To configure a reputation definition:

  1. Log in to the Administration Console.
  2. Click on the Administration menu item.
  3. Click on the Gateway | Policies menu item.
  4. Click on the Definitions button.
  5. Click on the Reputation Definition menu item. Any existing definitions are listed.
  6. Either:
    • Click the Add Reputation Definition button to create a definition
    • Click on the definition to be changed.
  7. Complete the Reputation Properties section as follows:

    DescriptionSpecify a name for the definition to enable you to identity it's purpose.
    Mimecast Global Permitted List

    If selected, the connecting IP address of all inbound email is checked against an permit list maintained by our Security Team. This list comprises domains known to be of good reputation. If the connecting IP address is on the permit list, it bypasses spam checking.

    Global Block ListsIf selected, all inbound email is checked for spam against six IP address based block lists. This option is used in conjunction with the "Number of Block List Hits" option.
    Number of Block List Hits

    Specify a value to set the number of hits required before the sending IP address of a message is rejected.

  8. Select the Save and Exit button.


Example Use Cases


Example 1: IP Address on Two or More Block Lists


In this example, messages are rejected when the IP address is found on a minimum of two block lists, and the policy applies to emails from "Everyone to Internal":

Reputation Definition Example 1

Example 2: on all Block Lists


In this example, we deactivate the Mimecast Global Permitted List for, with a requirement that the sending server of the mail for is found on all block lists. In this example, the policy is set to apply to emails from to "Internal".

Reputation Definition Example 2

See Also...


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