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List: kolab-users
Subject: Re: managing spam
From: "Nathanael D. Noblet" <nathanael () gnat ! ca>
Date: 2015-06-29 20:19:42
Message-ID: 1435609182.9292.5.camel () gnat ! ca
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Hello,
I use three pieces of software for this.
1) greylisting service postgrey (soft rejects mail from a sender on
first seen for the first 10 minutes)
2) RBL - real time blacklisting, the most effective one I've found is
barracuda's (you sign up but otherwise it is free)
3) DSPAM - is a bayesian filter that catches the most of the rest.
None of these are specific to kolab but to postfix/mta's in general.
On Fri, 2015-06-26 at 11:19 -0400, John Smith wrote:
> 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.
>
> 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.
>
> So what are my options? I can't manage this via server filters
> anymore because each subject / sender / ip address is different.
>
> Is there not a way to say to kolab: "if sender is in addressbook,
> move email to folder X"?
>
> 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.
>
> Am I out of luck?
> _______________________________________________
> users mailing list
> users@lists.kolab.org
> https://lists.kolab.org/mailman/listinfo/users
[Attachment #5 (text/html)]
<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> <pre>_______________________________________________
users mailing list
<a href="mailto:users@lists.kolab.org">users@lists.kolab.org</a>
<a href="https://lists.kolab.org/mailman/listinfo/users">https://lists.kolab.org/mailman/listinfo/users</a></pre></blockquote></body></html>
_______________________________________________
users mailing list
users@lists.kolab.org
https://lists.kolab.org/mailman/listinfo/users
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