[Sorry, this list was obviously worthless. Use with caution.]
#blackholes.mail-abuse.org
#dialups.mail-abuse.org
#relays.mail-abuse.org
orbs.dorkslayers.com
#dsn.rfc-ignorant.com
#postmaster.rfc-ignorant.com
orbz.gst-group.co.uk
manual.orbz.gst-group.co.uk
relays.osirusoft.com
relays.ordb.org
inputs.orbz.org
outputs.orbz.org