Connect Application: Setting Up Recipient Validation

Document created by user.oxriBaJeN4 Employee on Oct 22, 2015Last modified by user.Yo2IBgvWqr on Dec 5, 2017
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Applies To...


This page applies to new clients connecting with Mimecast using the Connect Application. If you are not using the Connect Application, click here.




To ensure only messages destined for valid internal email addresses are accepted, we need to validate the recipients of all inbound email. Emails that can't be matched against a valid internal address will be rejected.


Recipient Validation SummaryTo set up recipient validation:

  1. Click on the Gateway | Set Up Recipient Validation menu item.
  2. Either click the:
    • Accept Directory Users button to only accept emails for addresses synchronized from your directory.
      This option is only available if you've completed the Synchronize Your Directory step.
    • Enable Known Addresses button to accept emails for all known addresses in your domains. This includes addresses synchronized from your directory, imported via a spreadsheet, and created manually.
  3. A summary page is displayed confirming your recipient validation setup.