[exim] Routeur on List-Id ?

Hi,
On a debian/exim/sympa list server, I plan to write a List-Id oriented
router.

I wrote this:
some_router:
debug_print = "R: some_router for $local_part@$domain"
condition = ${if match {$h_List-Id}{<test.my.domain>} {yes}{no}}
driver = manualroute
route_list = * A.B.C.D
transport = remote_smtp

but, the condition seems to never be true :-(
What's wrong ?

regards

--
Francois Sauterey