Re: blacklist based on authoritative nameservers of sender domain

2011-08-27 Thread SM
At 16:52 22-08-2011, Adam Katz wrote: You can't do whois en-masse (I'd love that, but ...), so this means an NS host lookup. To determine if they are authoritative, that's another lookup (which I don't believe is necessary). A blocklist would also be another lookup (if using a BL, it could chec

Re: blacklist based on authoritative nameservers of sender domain

2011-08-22 Thread Axb
On 2011-08-23 7:38, Michael Scheidell wrote: On 8/22/11 7:13 PM, Noah Meyerhans wrote: I've recently observed a fair amount of spam from domains that all share the same set of authoritative nameservers. postfix: check_sender_ns_access SA has this already... and more. read into URIDNSBL.pm an

Re: blacklist based on authoritative nameservers of sender domain

2011-08-22 Thread Benny Pedersen
On Tue, 23 Aug 2011 01:38:08 -0400, Michael Scheidell wrote: On 8/22/11 7:13 PM, Noah Meyerhans wrote: I've recently observed a fair amount of spam from domains that all share the same set of authoritative nameservers. postfix: check_sender_ns_access if outright blocking is wanted (its stup

Re: blacklist based on authoritative nameservers of sender domain

2011-08-22 Thread Benny Pedersen
On Mon, 22 Aug 2011 16:13:03 -0700, Noah Meyerhans wrote: I've recently observed a fair amount of spam from domains that all share the same set of authoritative nameservers. 1: make the plugin 2: add whitelist/skiplist could ideally be urlbl_skip_domain that are used commit code to sandbox

Re: blacklist based on authoritative nameservers of sender domain

2011-08-22 Thread Axb
On 2011-08-23 2:21, dar...@chaosreigns.com wrote: On 08/22, Adam Katz wrote: this not worth doing? I realize that the potential for collateral damage is high, so I don't think it'd be wise to try and publish any sort of data for such a plugin, but it seems like the plugin itself might be occasi

Re: blacklist based on authoritative nameservers of sender domain

2011-08-22 Thread Michael Scheidell
On 8/22/11 7:13 PM, Noah Meyerhans wrote: I've recently observed a fair amount of spam from domains that all share the same set of authoritative nameservers. postfix: check_sender_ns_access -- Michael Scheidell, CTO o: 561-999-5000 d: 561-948-2259 >*| *SECNAP Network Security Corporation *

Re: blacklist based on authoritative nameservers of sender domain

2011-08-22 Thread darxus
On 08/22, Adam Katz wrote: > > this not worth doing? I realize that the potential for collateral > > damage is high, so I don't think it'd be wise to try and publish any > > sort of data for such a plugin, but it seems like the plugin itself > > might be occasionally useful... > > It might be use

Re: blacklist based on authoritative nameservers of sender domain

2011-08-22 Thread Adam Katz
On 08/22/2011 04:13 PM, Noah Meyerhans wrote: > I've recently observed a fair amount of spam from domains that all > share the same set of authoritative nameservers. It occurred to me > that it might be nice to be able to blacklist mail from all domains > sharing these nameservers, or maybe to sim