DNS Blacklists Sites. All of them? or no?

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duke16
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DNS Blacklists Sites. All of them? or no?

Post by duke16 » 2007-03-25 03:19

Is it a good idea to select all three DNS blacklist sites? Or is that just redundant.

Also, a related question. What is the order for checking spam? SURBL and then DNS blacklist, or vice versa? And, if something gets marked spam by SURBL or DNS blacklist, will it check the other also? Or just reject it at that point.

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Slug
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Re: DNS Blacklists Sites. All of them? or no?

Post by Slug » 2007-03-25 08:46

duke16 wrote:Is it a good idea to select all three DNS blacklist sites? Or is that just redundant.
I use about 6, its something only you can decide for yourself. Just choose them wisely.
Also, a related question. What is the order for checking spam? SURBL and then DNS blacklist, or vice versa?
DNSBL then SURBL
And, if something gets marked spam by SURBL or DNS blacklist, will it check the other also? Or just reject it at that point.
It will reject at the first piont it gets a positive.

Michael
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porcupine
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Post by porcupine » 2007-03-25 20:27

The three DNSBL's in hMailServer work very well.

I don't find that SURBL is all that reliable, it blocks too many good sites. If you have DNSBL and GreyListing turned on, you already got 80-90% of spam blocked.

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martin
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Post by martin » 2007-03-25 20:33

porcupine, are you sure about the SURBL part? I've seen cases where users have had DSN configuration problems which have the effect that all email including a header has been marked as "SURBL-Spam"

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Post by porcupine » 2007-03-25 20:39

SURBL was catching the advert signatures from Yahoo and Hotmail users messages. Whereas a paid-up member of Yahoo with no adverts in the signature passed through. As soon as I saw this happening I turned it off.

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Post by duke16 » 2007-03-27 04:15

Where can I get a list of DNSBL? ordb is no longer around, so I only have 2 listed now.

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