I've reproduced the problem with debug on and verified that the URI is
not in SURBL according ti the checker website but is flagged by
SpamAssassin. I'll open a bugzilla ticket and attach the email and the
log output there.
I'll send an email to the other Cc's on this list with the ticket URL
once I have it, if you want to follow the progress there.
See ya in the ticket...
-- sidney