[Exim] Multiple DNSBL in warn only generates X-Warning heade…

I have the following ACL for doing my DNS blacklist checks:

check_recipient:
  accept  hosts = :
  accept  recipients = postmaster@???
  deny    hosts = /etc/exim/sendernetreject
  warn    hosts = +rbl_hosts
          message = X-Warning: $sender_host_address is listed at $dnslist_domain\nX-Warning: $dnslist_text
          dnslists = relays.ordb.org:relays.visi.com:\
                     proxies.relays.monkeys.com:formmail.relays.monkeys.com:\
                     dynablock.wirehub.net:spews.relays.osirusift.com:\
                     sbl.spamhaus.org
  require verify = sender
  accept  domains = +local_domains
  accept  domains = +relay_domains
  accept  hosts = +relay_hosts

Under Exim 3, multiple matches against a DNSBL in warning mode would add a
header for each match. The above only adds it for the first match. I did a
quick check of the spec and couldn't find anything, so is there any way to
replicate the Exim 3 behavior?

Tabor

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Tabor J. Wells                                     twells@???
Fsck It!                 Just another victim of the ambient morality