[exim] Wildcards in /etc/staticroutes ?

I'm trying to do some custom routing for mail being sent to roadrunner.com.
Unfortunately, they give their users subdomain emails, like @cfl.rr.com, @
wi.rr.com, @tampabay.rr.com, etc.

I've tried putting this into /etc/staticroutes

*.rr.com: 1.2.3.4

But this does not seem to be working. I've had to resort to trying to build
my own list of all *.rr.com subdomains, like:

cfl.rr.com: 1.2.3.4
wi.rr.com: 1.2.3.4
tampabay.rr.com: 1.2.3.4

Is there a better way?

The reason for the custom routing is that roadrunner.com was blocking mail
from one of our servers, due to a bogus RBL flag. We were able to get them
to fix the block, so now this is mainly for my own education... if this
happens again, I can be better prepared.

Thanks!

- Scott