Vahric MUHTARYAN wrote:
Hi Everybody ,
I started spamassassin score from 6.5 , now I’m watching the mail flow
and I saw that if mails are really a mail they have a point bettween
0.1 – 1.x , and some of spams are getting score between 5.0 – 5.9 and
because of this I couldn’t catch it . Actually I know I can play with
scores and now I ‘m watching carefuly mail traffic for reducing limits
, and I need spamassassin people recomendation , What is your
spamassassin scores ?
I use the default required_score of 5.0. Some use more, some use less,
but most start off at 5.0.
Shifting to 6.5 will reduce your false positives, but will also greatly
increase your miss rate.
Stealing a little data from the set3 statistics:
http://spamassassin.apache.org/full/3.1.x/dist/rules/STATISTICS-set3.txt
# SUMMARY for threshold 5.0:
# Correctly non-spam: 53068 99.96%
# Correctly spam: 122508 98.97%
# False positives:23 0.04%
# False negatives: 1270 1.03%
# SUMMARY for threshold 6.5:
# Correctly non-spam: 53081 99.98%
# Correctly spam: 121740 98.35%
# False positives:10 0.02%
# False negatives: 2038 1.65%
In theory a threshold of 6.5 will have 56.5% fewer false positives, but also
60.4% more false negatives compared with 5.0.
That sounds about like what you're experiencing.
