Spam Blocking Advice

2014-12-25 Thread Asai
Greetings, We have a real spam problem for some users, and this seems to be really tough spam to block. I have postscreen set up which blocks a lot of spam, of the spam that does get through, Spamassassin catches about 200 spams a day, but we have about a dozen users that get 20 - 30 spams a

Re: Spam Blocking Advice

2014-12-25 Thread Wietse Venema
Asai: Greetings, We have a real spam problem for some users, and this seems to be really tough spam to block. I have postscreen set up which blocks a lot of spam, of the spam that does get through, Spamassassin catches about 200 spams a day, but we have about a dozen users that get 20 -

blocking bounces from spam advice

2014-12-25 Thread lists
I have a small Postfix installation with virtual domains that runs well, however, a user is complaining of being hit with flood of rejects from spam sent out from elsewhere as though from him, the rejects are coming back to him the user in question has been, by his former request, exempted from

Re: Spam Blocking Advice

2014-12-25 Thread li...@rhsoft.net
make them hate you by more aggresive RBL scoring and *slow down them* as well as consider a manual trained global bayes with at least 1000 ham and 1000 spam messages * find common tags in the maillog * adjust scores in SA local.cf for them * adjust the scores for bayes after it si well trained

Re: Spam Blocking Advice

2014-12-25 Thread li...@rhsoft.net
oh and don't forget URIBL scores for SpamAssassin URIBL_BLACK has a zero-false-positive policy as said, sapmass-milter runs with block above 8.0 here and the default max-message size which is scanned is *way* too low, spammers know that /usr/sbin/spamass-milter -p