On Wednesday, December 8, 2004, 8:51:04 PM, RD RD wrote:

Hello List,

Is there an available % FP rate for SC and JP ? I thought I should ask to help me decide whether I should keep dropping e-mails w/ blacklisted URIs.

FP rates vary a lot depending on whose spam and ham corpra are used, but here are some from SpamAssassin corpora against older versions of the SURBL lists. Most of the SURBL lists now have better FP rates due to cleanup we've been doing along the way:

OVERALL% SPAM% HAM% S/O RANK SCORE NAME 2424443 2357143 67300 0.972 0.00 0.00 (all messages) 100.000 97.2241 2.7759 0.972 0.00 0.00 (all messages as %) 7.595 7.8122 0.0045 0.999 1.00 0.00 URIBL_SC_SURBL 76.754 78.9448 0.0178 1.000 0.80 0.00 URIBL_OB_SURBL 77.230 79.4340 0.0208 1.000 0.60 1.00 URIBL_PJ_SURBL 0.985 1.0126 0.0045 0.996 0.50 0.00 URIBL_AB_SURBL 82.119 84.4600 0.1367 0.998 0.40 0.00 URIBL_WS_SURBL 0.021 0.0216 0.0045 0.829 0.00 0.00 URIBL_PH_SURBL

(PJ is JP)

The ones below are from Theo:

OVERALL% SPAM% HAM% S/O RANK SCORE NAME 116529 104033 12496 0.893 0.00 0.00 (all messages) 100.000 89.2765 10.7235 0.893 0.00 0.00 (all messages as %) 70.128 78.5520 0.0000 1.000 1.00 0.00 URIBL_JP_SURBL 66.637 74.6398 0.0160 1.000 0.99 0.00 URIBL_OB_SURBL 72.039 80.6879 0.0320 1.000 0.99 0.00 URIBL_WS_SURBL 20.548 23.0158 0.0000 1.000 0.97 0.00 URIBL_SC_SURBL 17.312 19.3919 0.0000 1.000 0.96 0.00 URIBL_AB_SURBL 0.065 0.0721 0.0080 0.900 0.51 0.00 URIBL_PH_SURBL

and some older stats without JP:

OVERALL% SPAM% HAM% S/O RANK SCORE NAME 121405 22516 98889 0.185 0.00 0.00 (all messages) 100.000 18.5462 81.4538 0.185 0.00 0.00 (all messages as %) 13.453 70.3766 0.4925 0.993 1.00 1.00 SURBL_WS 3.807 20.3811 0.0334 0.998 0.50 1.00 SURBL_SC 2.650 14.2565 0.0071 1.000 0.50 1.00 SURBL_AB 0.019 0.0933 0.0020 0.979 0.50 1.00 SURBL_PH 12.624 67.6275 0.1001 0.999 0.50 1.00 SURBL_OB

OVERALL% SPAM% HAM% S/O RANK SCORE NAME 151033 122586 28447 0.812 0.00 0.00 (all messages) 100.000 81.1650 18.8350 0.812 0.00 0.00 (all messages as %) 23.882 29.4218 0.0105 1.000 0.98 0.00 RCVD_IN_XBL 17.441 21.4837 0.0176 0.999 0.97 0.00 URIBL_SC_SURBL 53.206 65.5156 0.1582 0.998 0.90 0.00 URIBL_OB_SURBL 9.897 12.1449 0.2074 0.983 0.82 0.00 URIBL_AB_SURBL 58.068 71.4494 0.4043 0.994 0.79 0.00 URIBL_WS_SURBL 0.017 0.0204 0.0000 1.000 0.48 0.00 URIBL_PH_SURBL

Jeff C. -- "If it appears in hams, then don't list it."