How to exclude email addresses from being added to cases automatically
Email to Case Premium includes a feature that looks at the To: and CC: fields on an inbound email and can automatically add a Contact Role or Case Team Member if a Contact or User match is found on the email address, this includes auto-created addresses. Depending on your configuration, additional email addresses may be added to the Additional To and CC fields. You may want to prevent this from happening for specific email addresses or domains.