Re: proper syntax for SenderHeaders in opendkim.conf

From: Murray S. Kucherawy <>
Date: Sat, 18 Apr 2015 21:41:02 -0700 (PDT)

On Wed, 15 Apr 2015, Arnoldas Brazys wrote:
> I didn't get it. How do I sign emails based on Sender header (on behalf),
> wildcard does not fit, as I have a lot of keys in my opendkim setup. I need
> opendkim to use correct key/domain what is in Sender header.
> In v2.9.0 I am happy with using this:
> SenderHeaders Sender,From
> As "SenderHeaders" is deprecated in 2.10
> How do I correctly convert to newest version?

You would use the Lua hooks to do this now. The man page for
opendkim-lua(3) should have the information you need to set this up, but
basically you would write a script that pulls out the Sender header field,
then makes a signing request based on what's in there. This would need to
be referenced as the "setup" Lua script. So:

sender = odkim.get_header(ctx, "Sender", 0)
[whatever logic you want here, then]
odkim.sign(ctx, name-of-key-to-use)

The "name-of-key-to-use" is expected to be a name that appears in your

Received on Sun Apr 19 2015 - 04:41:18 PST

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