RE: Double signing with OpenDKIM

From: Murray S. Kucherawy <>
Date: Fri, 12 Aug 2011 15:15:25 -0700

> -----Original Message-----
> From: [] On Behalf Of SM
> Sent: Friday, August 12, 2011 3:00 PM
> To: Jonathan Casco
> Cc:
> Subject: Re: Double signing with OpenDKIM
> Hi Jonathan,
> At 14:42 12-08-2011, Jonathan Casco wrote:
> >What I was looking to do was sign mail from a domain that is not
> >necessarily present in the from or sender headers.
> You can DKIM sign a message using a domain name which is not used in
> the "From:" or "Sender:" headers; see SigningTable in the opendkim.conf
> manual.

The SigningTable tells the filter which key(s) to use based on the determined message sender. That's based on the From: field by default, but you can use SenderHeaders to change that list.

It, however, doesn't have very complicated logic; it can't do multiple signatures based on different values, for example. You probably need the Lua extensions for that.

So, to help us point you at the right solution for you, can you show us an example message that shows the address(es) you want to extract, and what signature(s) you want to add for each?
Received on Fri Aug 12 2011 - 22:15:32 PST

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