What does the error User 1 set for local_mbx_delivery transport is on the never_users list mean?

You have configured the local_mbx_delivery to run as the user whose id (uid) is 1. However, this user is on the list defined by the never_users runtime option, or the <small>FIXED_NEVER_USERS</small> compile-time option. These are safety catch > lists; Exim refuses to deliver to any user that is on them. The most

common use of never_users is to avoid doing any deliveries as root, but it can contain other uids.

---