<html><head></head><body><div>Hello,</div><div><br></div><div> I use three pieces of software for this. </div><div><br></div><div>1) greylisting service postgrey (soft rejects mail from a sender on first seen for the first 10 minutes)</div><div>2) RBL - real time blacklisting, the most effective one I've found is barracuda's (you sign up but otherwise it is free)</div><div>3) DSPAM - is a bayesian filter that catches the most of the rest.</div><div><br></div><div>None of these are specific to kolab but to postfix/mta's in general.</div><div><br></div><div>On Fri, 2015-06-26 at 11:19 -0400, John Smith wrote:</div><blockquote type="cite"><div dir="ltr">I'm getting a ton of spam recently; 50+ messages in one day. At first it was just 2 or 3 per day, and I setup a few kolab filters to handle it based on subject or sender, a bit of a pain but doable.<div><br></div><div>Then I tested a new email client called "Geary" and the thing just nicely downloads all images it finds in the email; yeah at that point the spammers got their "this user exists and read the email" notification due to the image hit on their server and I suddenly (next day) got dumped on and it hasn't let up.</div><div><br></div><div>So what are my options? I can't manage this via server filters anymore because each subject / sender / ip address is different.</div><div><br></div><div>Is there not a way to say to kolab: "if sender is in addressbook, move email to folder X"? </div><div><br></div><div>What about an easy way to run spam detection on my server; it's stock cent os with just kolab 3 installed. I took a peek once at installing a spam detection engine into kolab but my eyes sort of glazed over when I read the massive page of instructions. Just getting kolab installed was nightmare itself, don't want to take a chance of messing something up now that it's all working.</div><div><br></div><div>Am I out of luck?</div></div>
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