Hi! I want to completely disable the "send copy to" feature (for email) of ISPConfig. The reason is, that some of our users forward all their mail to a gmail address with this feature. They get a lot of spam -> the spam gets forwarded to gmail, and gmail thinks our server is spamming, and rate-limits us, or at least degrades our rating. Is there a sensible way to disable the "send copy to" feature?