## If the client has authenticated using TLS then we're OK. The
## sender was presumably checked upstream, and we can believe that
## the name has been transmitted honestly.
## If the client has authenticated using TLS then we're OK. The
## sender was presumably checked upstream, and we can believe that
## the name has been transmitted honestly.
## If this is submission, and the client has authenticated, then we
## check that the name matches the user.
## If this is submission, and the client has authenticated, then we
## check that the name matches the user.