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What is the best real time blacklist?

By Packet Spoofer ·
I have all of the antispam software I can think of to fight spam, and I am still getting a lot of it. I know I am not alone. Is there anyone out there who knows a good RBL that stops most spam? If I ramp my heuristics level any higher, I will stop alot of legitimate emails from coming through the system. Thanks.....

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by BFilmFan In reply to What is the best real ti ...

CypherTrust IronMail Appliance almost always gets my vote, but then it costs a fortune, but it does eliminate spam.

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by Packet Spoofer In reply to

Thanks B, trying to tweak exisiting anti spam though....

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by Jim_MacLachlan In reply to What is the best real ti ...

An RBL isn't going to solve your problem alone. I use 4 RBLs: cbl.abuseat.org
pdl.pan-am.ca
dnsbl.njabl.org
dynablock.njabl.org
& they're OK, but a lot of Spam gets by them. A listing on any one of the RBLs will block an email. I have to back it up with other methods. I still do key word, domain, several kinds of heuristics & attachments to slow spam/viruses down. One of the worst spam problems is people with misconfigured AV software that send out an email saying someone from my domain sent them a virus.

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by Packet Spoofer In reply to

DNSBL.NJABL.ORG helps.....we still get it though....Heuristics is a pain though...It is definitely not an exact science...

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by rick_b In reply to What is the best real ti ...

Price wise, You can't be Barracuda.
http://www.barracudanetworks.com
This is a great box for a small to med business.
Also this is one of the best sources to get educated. http://www.spamhaus.org/

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by Packet Spoofer In reply to

Poster rated this answer.

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by curlergirl In reply to What is the best real ti ...

Spamcop.net is the best blocking service I have ever used; it is not actually just a block list but it is also a reporting service. So it works best if you participate in the service by also reporting the spam that gets by. Look at the web site - www.spamcop.net - and see how they do things. It's different from any other block list I've seen or used. If you use it in combination with other rbls, like ordb.org, which I've also found to be pretty good, you'll block about 90% of your spam. If you're using heuristics in addition, you'll probably get up to about 98%. I've never been able to get that additional 2%, though, because I find I get too many false positives. Not using anything with Bayesian filters yet, tho, so that remains to be seen.

Hope this helps!

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by Packet Spoofer In reply to

I appreciate the information....

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by mm212 In reply to What is the best real ti ...

I use rbl-plus.mail-abuse.org (costs a $ subscription fee), relays.ordb.org and list.dsbl.org. The free ones usually ask that you drop them an email letting them know you are using their service. I've found these three in combination work best for me, but there will always be some spam that makes it through. Just an estimate of what we see in a typical week:
We see 160,000 messages blocked by these RBLs, another 35,000 total get blocked by my custom block list, subject line filter, message body rules and heuristics and another 25,000 (a total guess on this one) make it through unblocked.

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by Packet Spoofer In reply to

Thanks for the information!

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