How to Block an Email Address or Domain for All Email Users

Email administrators have the ability to block an entire domain or individual email address from delivering messages to all email users. This feature is useful in blocking identified habitual spammers.

  1. Log in to webmail i.e. with an email administrative account.
  2. On the top menu, click Domain Settings (gears with globe icon).
  3. On the navigation pane on the left click on Content Filtering.
  4. When the Content Filtering section loads, click New to create a new rule.
  5. Enter a descriptive name for the new content filtering rule you are setting up i.e. Block

  6. Click New Condition.
    1. For the condition type select From Address.
    2. If blocking just an email address, select From specific addresses and put in the email address(es) to block in the From specific addresses (one per line) text box.
    3. If blocking an entire domain, select From specific domains and put in the domain(s) to block in the From specific domains (one per line) text box.
    4. Then click Save.
  7. Click New Action.
    1. Select the option Delete message.
    2. Then click Save.
  8. Click Save.

Now all emails sent from the specified email address(es) or domain(s) will never reach any of your user’s email accounts. Please note that these emails are not recoverable, thus be judicious in the email address(es) or domain(s) that you block.

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