OT: How to defeat address harvesting; like this..???

[Scott Silva]

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DNSAdmin wrote:
> Hello All,
> 
> Less than 24 hours of changing over a domain to a new mail server, and
> I've got a gnat I need to swat!
> 
> |Unknown users:
> |
> |   arnold@******.com
> |      from [222.233.140.203]    1 time(s).
> |
> |    bowen@******.com
> |      from [222.233.140.203]    1 time(s).
> |
> |    boyd@******.com
> |      from [222.233.140.203]    1 time(s).
> |
> (List condensed for mail list purposes. They tried to guess about 20
> users last night)
> 
> This is a harvesting attack to determine valid usernames to compile a
> spam list.
> 
> How do I defeat this??? Any decent suggestions appreciated! I might even
> consider the baseball bat if he/she were in my backyard!
> 
> I have CentOS 3.4, Sendmail 8.12, MailScanner 4.41, SpamAssassin 2.55
> 
> TIA!
> Glenn Parsons
> 
I found these in a 5 second search of Google;
http://www.amiga.ch/spamtracker/
http://www.samag.com/documents/s=8920/sam0311k/0311k.htm
You can probably find more.



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