On Sun, 22 Dec 2002 00:36:42 -0500, Jeff Adams wrote:

>  If the lists were useless, no one would use  them.  

   Many do use them not wisely. The blacklists which I know, differentiate 
bewetween "Open relay", "Dialin spam source" and "confirmed spam source", 
answering with different addresses for DNS queries to indicate these 
differences. Not to take these differences into account, i.e. treating a "Open 
relay" the same way as a "Confirmed spam source" is bad practice. 

>  If no one is using them, there would be no need maintain them. 

   Obviously the maintenance is of very varying quality. 

   I have the impression that some accept any denounciation by a spare time 
Pinkerton who was annoyed by some email. E.g. the listserver of the well known 
Topica service was flagged by one of the blacklisters. 

   When using these services, one should procede with with extreme care, 
according to my experiences, and not treat any suspicion as a valid 
conviction. 

   An example of bad usage of blacklisters is the domain hosting this list 
which blocks mail from legitimate subscribers to this list based on spurious 
grounds -- I myself have been victim of this, because two of the thousands of 
IP addresses assigned randomly by my ISP to its dial-in customers was listed 
by one of those blacklisters. 
 
Yours, 
L�ko Willms
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Frankfurt/Main  
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