[uxbod]

Another decent RBL :-

Spam DNS Lists - Computer Tyme Support Wiki

Some statistics on how it performs against other RBLs :-

Blacklists Compared

and the rules in /opt/zimbra/conf/salocal.cf.in to use it (remember to restart ZCS to write the change out to salocal.cf) :-

header          __RCVD_IN_JMF         eval:check_rbl('JMF-lastexternal','hostkarma.junkemailfilter.com.')
describe        __RCVD_IN_JMF         Sender listed in JunkEmailFilter
tflags          __RCVD_IN_JMF         net

header          RCVD_IN_JMF_WL        eval:check_rbl_sub('JMF-lastexternal', '127.0.0.1')
describe        RCVD_IN_JMF_WL        Sender listed in JMF-WHITE
tflags          RCVD_IN_JMF_WL        net nice
score           RCVD_IN_JMF_WL        -1.5

header          RCVD_IN_JMF_BL        eval:check_rbl_sub('JMF-lastexternal', '127.0.0.2')
describe        RCVD_IN_JMF_BL        Sender listed in JMF-BLACK
tflags          RCVD_IN_JMF_BL        net
score           RCVD_IN_JMF_BL        1.5

header          RCVD_IN_JMF_BR        eval:check_rbl_sub('JMF-lastexternal', '127.0.0.4')
describe        RCVD_IN_JMF_BR        Sender listed in JMF-BROWN
tflags          RCVD_IN_JMF_BR        net
score           RCVD_IN_JMF_BR        0.5