Re: OpenDKIM and Postfix milter protocol version

From: Steve Jenkins <stevejenkins_at_gmail.com>
Date: Mon, 22 Aug 2011 10:36:21 -0700

On Mon, Aug 22, 2011 at 10:00 AM, SM <sm_at_resistor.net> wrote:
> Hi Steve,
> At 09:37 22-08-2011, Steve Jenkins wrote:
>>
>> I received a question through my blog today that I hadn't thought
>> about. The question was:
>>
>> " I noticed that you suggest to set the milter_protocol to 2 in
>> main.cf. Postfix 2.6+ uses a different higher default (6) for the
>> protocol version. Since we're running other milters, I'm worried that
>> lowering the protocol could cause issues to the mail server. Postfix
>> does not seem to support configuration of a per-milter protocol
>> version.
>>
>> "Any idea why OpenDKIM require protocol version 2, or if it can also
>> work with version 6? Documentation on how the protocol changes from
>> version to version is sparse at best..."
>
> OpenDKIM does not require protocol version 2.  It is more about the lowest
> protocol version supported.  There are old installations out there.  If you
> are going to say "use version 6", you are requiring the people to upgrade
> other software.  That's a good way to ignore constraints in specific
> environments.

Does it depend on the version of libmilter that is installed? How can
I check to see which version of libmilter is on any given system, or
which OpenDKIM was built against?

SteveJ
Received on Mon Aug 22 2011 - 17:36:34 PST