Karanbir Singh wrote: > Ankur Rohatgi wrote: >> Hi all, >> I wanted spam filtering suggestions for a friend who's server is running >> qmail and spamassasin. They are also using spamhaus for RBL checks. This >> is still leading to a lot of junk email and i wanted to know what are >> you all using to tackle spam. He would be interested in a free or paid >> solution that can filter as much as possible. > > Have you considered grey listing ? That will drop anywhere from between > 85 - 88 % of spam at this time( numbers from an active metric done on a > moderately busy domain a few weeks back) . The number will keep reducing > over the next few years, but expect it to stay > 70% for atleast another > year + > >
I agree. Here are some similar stats from the greylisting daemon running on a server for the last year and half: List statistics since Fri May 20 17:55:24 2005 (572 days and 2 hours ago) ---------------------------- Of 263499 items that were initially greylisted: - 52516 ( 19.9%) became whitelisted - 210983 ( 80.1%) expired from the greylist And my criteria of greylisting is: 1. greylist all mails which come from <> 2. greylist all mails which come to specific domains. the only issue I have seen in using greylisting is customers not understanding why mails from customers are getting delayed or some braindead mailservers which bounce messages after seeing even a "message deferred. Please try later" status. - Sandip _______________________________________________ ilugd mailinglist -- ilugd@lists.linux-delhi.org http://frodo.hserus.net/mailman/listinfo/ilugd Archives at: http://news.gmane.org/gmane.user-groups.linux.delhi http://www.mail-archive.com/ilugd@lists.linux-delhi.org/
