Re: [swinog] reject_unknown_client_hostname

Hoi,

On Wed, Sep 29, 2010 at 2:33 PM, Juerg Reimann jr@jworld.ch wrote:

Does anybody know whether the Postfix checks reject_unknown_client_hostname [aka Reject the request when 1) the client IP address->name mapping fails, 2) the name->address mapping fails, or 3) the name->address mapping does not match the client IP address] follows actually any requirement by a RFC? If so, which one?

I do not think it is a requirement by RFC, and I also think it is strictly harmful to force the connecting IP address to resemble the hostname, for example a pool of machines called smtp[1-9].example.com going out via a single IP address. Calling them all smtp.example.com is (a) not true and (b) frustrates debugging.

groet, Pim