relay score less the the require and identified as spam

Kai Schaetzl maillists at CONACTIVE.COM
Sun Aug 29 20:32:05 IST 2004

Julian Field wrote on         Sun, 29 Aug 2004 14:37:23 +0100:

> How often do you think it is a problem? I tag based on SBL+XBL and have
> never had any complaints.

We use SBL+XBL for blocking at MTA level. I've almost never seen problems 
with it. There must be something about the UK providers which makes them 
appear that often on the list ;-) When using RBLs I see that most problems 
come from lists which use spamtraps. F.i. SORBS puts such a list in their 
overall list. So each time someone manages to send a spam mail over an 
ISP's legitimate mail relay to that spamtrap that relay appears on the 
list. That results in a false positive rate of something like 0.001 % 
which can be a lot of messages if you get them by the millions.



Kai Schätzl, Berlin, Germany
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