Re: [exim] Mail being queued: User 0 set for remote_smtp tra…

> 1] exim -d -bt root@(whatever your domain is)
>
> [root@<servername> ~]# exim -d -bt root@<server_hostname>
<snip>
> --------> system_aliases router <--------
> local_part=root domain=<server_hostname>
> calling system_aliases router
> rda_interpret (string): ${lookup{$local_part}lsearch{/etc/aliases}}
> search_open: lsearch "/etc/aliases"
> search_find: file="/etc/aliases"
> key="root" partial=-1 affix=NULL starflags=0
> LRU list:
> :/etc/aliases
> End
> internal_search_find: file="/etc/aliases"
> type=lsearch key="root"
> file lookup required for root
> in /etc/aliases
> lookup failed

So, you _haven't_ put an entry in the alias file for root.
Add the line

root: foo@???

to /etc/aliases but replace foo@??? with a real email address .
John