On 08/09/10 16:29, Nicolas Michel wrote:
I want to know if there is a way to reject connections from host not
listed in the MX records of the domain it claims to be.

Try http://www.policyd-weight.org/

It checks and compares the client IP, its HELO, the from address.
Among other attributes it also checks whether the client is an MX for its domain or in the same /24 subnet as the MX.

I also use it to include DNSBLs; because it uses a scoring system and a single false positive attribute or BL listing will not cause a reject.

--
Martin

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