On Mon, Aug 24, 2015 at 2:02 PM, Joseph D. Wagner <j...@josephdwagner.info> wrote: >> What do you mean by "without logins"? The email address needs >> to correspond to a user that already exists on the system? > > Yes. Here's what happened. A privileged user entered an external email > address into the CC field, which did not have an account. RT autocreated an > account for that person, and it accepted that external email address on the > CC field. I need to prevent that. > > How can I limit CC and AdminCC to email addresses that already have accounts? > Either rejecting the ticket or silently failing to add the CC/AdminCC email > address would be acceptable.
Use a callback. Do you know what those are? -m