Note: This feature is deprecated. Accounts signing after October 2020 will not see this option in their account settings. The Outlook Add-In and Gmail Integration features replaced Email Sync.
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We have given you the ability to block email activity for certain email addresses or domains. This will be really beneficial for users who want to block ALL internal activity.
Access your Account Settings > My Info > Email Sync. Click the Suppression List tab and the Edit Emails button.
You are able to suppress an entire domain or individual email address(es) based on your needs: