Please help us out with the following scenario.
Our Requirement is When a recipient sends an E Mail to a external Domain, The external recipient should be able to get an opt out option like, If he requests to stop receiving mails from the Zimbra Recipient, the server should know and restrict that particular user from sending mails to that particular external recipient. Just Like Unsubscribe option in the mail footer.
Please help us in the above scenario. Thanks in Advance