[exim] Recursive Lookups

Hello!

I haven't been looking at exim for a few years now, but I have finally got
my hands on a mail system which I need to maintain. One of the users has
an issue with the alias file and recursive lookups.

I am fairly certain that this is a design feature to avoid mail loops but
I will explain the issue. The user has an alias file and we lookup the
$original_local_part@$original_local_domain

The file is for example:

user@???: someone@???
loop@???: user@???

If the user emails loop@???, if recursive lookups work, it should
email someone@??? but doesn't. it continues to the next
router believing that it hasn't matched user@???

Anyone know a work around? Is this a good idea :>)

Cheers
Tim