Very unclear problem description. First of al if you mark spam the sender knows it is being received (and does not even know the message has been marked). Thus the best way to treat spam, is rejecting it.
So without any other info. Start rejecting messages instead of accepting them. Start posting those (relevant) message headers ;) -----Original Message----- To: users@spamassassin.apache.org Subject: The most efficient SPAM implementation ever Hello all: I have been a very satisfied user of spamassassin for a long time. Now I am facing a challenge, a problem that I cannot resolve. Years ago I was an active participant in the SolidWorks forum: https://forum.solidworks.com Unfortunately, there is a group there who when don't approve of a thread their response is to send you a barrage of e-mails, some sort of DOS attack. I have received thousands of those, during several years. I dutifully have those messages processed by sa-learn, but it is clear that they are immune to spamassassin. Instead of going up, their score goes down. I tried another approach (suggested by some of you folks): block the sender by sendmail, as seen below. Such defensive strategy was helpful for a couple years but now the spam has come back with a vengeance. Currently, my last line of defense is the only one that recognizes that stealth spam: the Thunderbird mail client. Please help. TIA, -Ramon F. Herrera ps: I do not have samples right now but will collect some and post them.
