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s2000news

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I looked around a bit, but I didn't see a thread like I wanted.

Simple question:

What Blacklists do you have on your Kerio server, what action is it set to? Free or Paid service?


Maybe we can build a list, and see who is using what, and who likes or dislikes any blacklist out there. Get a feel for it, then we can get a poll or something going.

Curious if new lists are catching peoples interested and so on.

Thanks!

Bryan
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TorW

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Finding the right blacklist or whitelist is hard enough without nilly-willy trying out whatever other people are using. A DNSBL stops the mail dead in its tracks without recourse, and a false positive may end up being a disaster. A good few blacklists stops a lot of mail, but they also have an alarming high rate of false positives and have proven hard to communicate with (read: SORBS).

How does one end up being listed (spamtraps, manually, dynamic pools etc.)? How does one get off the list again? Are MTAs you get lots of legit mail from listed anywhere? Do you have a manual whitelist? A manual blacklist? Do you maintain them? Do you have an upstream SMTP gateway?

No list of DNSBLs are right for everyone, and simply the number of rejects a DNSBL does is a poor metric. Spamhaus, for instance, have been characterized as everything from the saviour of the internet to the biggest fraud of all time.

I suggest you head over to http://www.dnsbl.com and do some research. Al Iverson knows what he's talking about and is pretty good at smoking out the less-than-stellar blacklists.
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stupot1397

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One I would certainly NOT use is SORBS

We started getting quite a few false positives for no real legitimate reasons.

I removed this one and I have had no significant increase in spam, and my legitimate mail is coming through finally!
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freakinvibe

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We are using these ones for years and are very happy with it:

zen.spamhaus.org ==> Block
bl.spamcop.net ==> Block
db.wpbl.info ==> +3
ix.dnsbl.manitu.net ==> +3
dnsbl-1.uceprotect.net ==> +3
dnsbl-2.uceprotect.net ==> +2
dnsbl.sorbs.net ==> +2
b.barracudacentral.org ==> +2

As TorW said, your mileage may very depending on where you are in the world, what business you are in etc. So the above is just a config the works for *us*, but probably not for you.

For Barracuda, you have to register (free). The others, you can just access. I would not use a blacklist that charges to be removed, that's bad policy. Spamhaus definitely catches the most for me.

Dexion AG - The Blackberry Specialists in Switzerland
https://dexionag.ch
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j.a.duke

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freakinvibe wrote on Fri, 29 April 2011 05:08
We are using these ones for years and are very happy with it:

zen.spamhaus.org ==> Block
bl.spamcop.net ==> Block
db.wpbl.info ==> +3
ix.dnsbl.manitu.net ==> +3
dnsbl-1.uceprotect.net ==> +3
dnsbl-2.uceprotect.net ==> +2
dnsbl.sorbs.net ==> +2
b.barracudacentral.org ==> +2


What are your spam tag and block numbers? I'm using 3.1 & 6.9 for one install.

Thanks.

Cheers,
Jon
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freakinvibe

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Quote:
What are your spam tag and block numbers? I'm using 3.1 & 6.9 for one install.

5.0 = tag
9.9 = block

We are also using spam repellent with 16 seconds.

Dexion AG - The Blackberry Specialists in Switzerland
https://dexionag.ch
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