Am 28.11.2012 14:55, schrieb vi...@vheuser.com:
> I am receiving spam from ever changing client IP addresses.  Each spam has 
> other tiny variations that prevent
> string matching.  The one thing they all have in common is the owner of the 
> IP addresses.  Is there any way to do
> lookup of the client IP owner at Prescreen or SMTP time to REJECT the 
> incoming connection?  Is this a workable
> solution?  I've searched the web, the documentation and archives.  No luck.  
> Does anyone have a solution or
> script?  Thanks!

look at the whois of the ip and block the whole range
but this should be done with iptables or whatever
packet filter and NOT on the MTA!

example: 10.0.0.0/24 = 10.0.0.1-10.0.0.255

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