Hello,

I would appreciate some help configuring maddy with mailman 3. With
the default maddy.conf, mailman-core was unable to send emails:

> Unauthorized use of sender address

It fails because maddy.conf has the following:

    check {
        authorize_sender {
            prepare_email &local_rewrites
            user_to_email identity
        }
    }

Removing this block makes emails work. I only have one set of
credentials on this installation so I think it's safe to remove it. So
this leads me to two questions:

- Is it safe to remove the block when I only have one set of credentials?
- How do I make the authorize_sender block do the user_to_email
verification except for a particular user?

Thanks,
Hugo Peixoto