Using rbl lists

[DNSAdmin]

At 01:06 PM 12/12/2004, you wrote:

>I don't agree 100% with this approach. Using BL at the MTA has some very
>significant benefits. The most significant is that rejecting at the MTA
>prevents any further downstream processing by either MS or SA (and virus
>scanner) which are all resource intensive. On server where there is a lot of
>incoming spam, this will make a huge difference.
>
>I do agree that not all lists are appropriate for rejection at the MTA, but
>certainly ORDB is. I also use Spamcop at the gateway, and find few (to no)
>FP's. Others, such as SORBS, are effective but have a tendency to
>occasionally list major smtp servers such as AOL etc., so more care needs to
>be taken.

I found SpamCop to be too liberal, and found that it blocked wanted mail. I
quarantined during the tests. You should try testing with that BL!

>Chris
>
>----- Original Message -----
>From: "Michele Neylon :: Blacknight Solutions"
><michele at BLACKNIGHTSOLUTIONS.COM>
>To: <MAILSCANNER at JISCMAIL.AC.UK>
>Sent: Sunday, December 12, 2004 3:53 AM
>Subject: Re: Using rbl lists
>
>
>>MailScanner mailing list wrote:
>>>Quick question about spam blacklists (RBLs).
>>>
>>>I've added a few lists to the "Spam List" setting but what
>>>determines whether a message gets classified as spam?  If the
>>>sending server, for example, is on one RBL then is this sufficient?
>>
>>As already mentioned one RBL is enough to block the mail. The problem with
>>the RBLs being used in this way is that it is a very blunt tool and your
>>FP
>>rate can be very high. Using the RBLs via SA gives a better result.
>>
>>
>>
>>Mr Michele Neylon
>>Blacknight Internet Solutions Ltd
>>Hosting, co-location & domains
>>http://www.blacknight.ie/
>>Tel. +353 59 9137101
>>http://www.blacknight.ie/specialoffers.html
>
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