We use exim for our family's MTA, and I want to set up a "protected" email address for my son.
I thought a quick-and-dirty approach would be to set up all his incoming and outgoing mail to go to my wife and me (with a rewritten reply-to address) and then be frozen, and we could send an email back to exim to unfreeze it. Basically, I want a moderated email list but in both directions - I want outgoing mail to also require manual approval. (And I'm hoping to get away without having to install yet another package, because I'm trying to keep the mail server as simple as possible to minimize my vulnerable surface area.)
Does anyone have an example of such an exim configuration that approximates this, or any better suggestions?