otrs.NewTicketOnlyFromKnowEmail

This OTRS/Znuny/Ligero extension provides a specialized Postmaster filter that controls the creation of new tickets via email. For every incoming email, the module checks whether the sender's address can be assigned to a customer user already registered in the system. If this is not the case, ticket creation is blocked. This is particularly useful for organizations that want to limit their support to a closed group of users or are struggling with massive amounts of spam via the email interface. The extension integrates seamlessly into the system's existing filter chain.