How to block a mail address in Mimecast Administration Console?

Software | Mimecast

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Choose the tab: "Administration & Monitoring" and log on with your domain credentials (Email Address and Password - Select Domain option) into ADMINISTRATION AND MONITORING.

Click "Administration".

Choose "Directories" and select "Profile Groups".

Click "Blocked Senders".

Click "Build" and select "Add Email Addresses" or "Add Email Domains".

Type or paste your Email Addresses or Domains into the field.

Click "Save and Exit".