Tuesday, 23 June 2015

Block domain extensions using Transport rules

Sometimes organization prefer to block (or) mark as spam Emails coming from .EU or .ME domains, Below are the steps to block any domains based on domain extensions. Example : doing this would block any mails coming from user@domain1.eu, user@domain2.eu etc...

  1. Access Exchange admin center.
  2. Navigate to mail flow > rules.
  3. Click the plus icon to create a new rule.
  4. In the pop up window, click More options.
  5. Configure the rule according to the screenshot:
  6. Save.
.eu$ is a RegEx pattern which matches with user@a.eu, user@b.eu.. etc..

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