[SURBL-Discuss] Stats wanted

[Rick Macdougall]

Jeff Chan wrote:
> Hi All,
> SURBL is looking for statistics about what portion of unsolicited our
> lists are detecting (ideally in large mail flows).  An overall number
> would be ideal, as in what fraction of total unsolicited messages are
> caught by any SURBL list.  One possible way to measure this from
> SpamAssassin-processed messages would be to count the messages marked
> as spam that had 'SURBL' in their scores versus the ones that didn't
> have a SURBL rule hit.  The ratio would be the spams with SURBL hits
> divided by total number of spams.
> 
> Another way would be to count the SURBL hits from an MTA milter, but
> to have the meaningful denominator, one would need a count of the
> total spams, which a simple SURBL-only milter would not be able to
> provide.  Something else, or a more sophisticated milter would need to
> count the total spams in order to get the denominator.
> 
> Ideally the results would be after MTA blocking with a major sender
> blacklist like zen.spamhaus.org.  Please let us know whether a sender
> blacklist is used in the MTA or not.
> 
> Any results would be greatly appreciated.
> 

Hi,

 From about a weeks worth of data with the MTA blocking using 3 sender 
blacklists. There are 2 separate MXs with 2 spamd machines in round robin.

[spa010 spamd]# grep "identified spam" * | wc -l  - Spam
57993
[spa010 spamd]# grep SURBL * | wc -l  - SURBL hits
43077
[spa010 spamd]#  grep bytes * | wc -l  - Total Messages
180763

Regards,

Rick