Authentication-Results headers from the DKIM milter

Vernon Schryver
Mon Apr 12 17:45:22 UTC 2010

> From: Gary Mills <>

>                                      With the `--with-domainkeys'
> configure option, it too produces the two headers:
>     Authentication-Results:; dkim=pass (1024-bit key)
>   ; dkim-adsp=pass
>     Authentication-Results:; domainkeys=pass (testing)

>     Would it work to have the DK and DKIM results both in the same
>     Authentication-Results header field?
> How well would this work with DCC?  Would it be better to have only
> one selected authentication method, or both of them?  I'm assuming
> that there would be a configuration setting to define the precedence
> if the milter only selects one.

I'm uncertain what "work" means in this case.  However, 
  - if neither of the two separate headers nor the combined DK and DKIM header
      change for a given SMTP client (mail sender),
  - and if no mail from any other SMTP client has any or all of the
      same headers,
  -and if all three (two individuals and one combined) are in

then all mail from that SMTP client will be whitelisted by dccm and dccifd,
and no mail from any other SMTP client will be affected by those
whiteclnt entries.

Vernon Schryver

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