On 11/6/2010 9:04 AM, Wietse Venema wrote:
There's already demand for DNS lookups for header substrings. This
resulted in a header_checks plugin by Sahil, if I recall correctly.
Native support for DNS lookups from header_checks fragments could
look like this:
I think it's premature to design DNS lookups into header
checks. Sahil's header_checks plugin works, but -- at least
for me -- blocks very little additional spam, about 1 per
thousand messages received. I'm not sure it's worth the
effort of adding native support. And of course Sahil's plugin
could be easily modified to pre-load DKIM keys if that's found
to be useful.
I'd rather see postfix effort on supporting (pseudo-)?regexp
or IP range for the dnsbl/dnswl result filters, which seems
more generally useful.
-- Noel Jones
