Re: [exim] DKIM Signing while send mail from subdomain

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Author: Klaus Ethgen
Date:  
To: exim-users
Subject: Re: [exim] DKIM Signing while send mail from subdomain
Hi Dilip,

Am Fr den 2. Jan 2015 um 8:28 schrieb LinuxAdmin:
> I am using exim-4.80.1-49 & using DKIM signing, My prob is when i send mail using subdomain DKIM verification got failed.

[...]

You can solve it like the following:
> DKIM_DOMAIN = ${lc:${domain:$h_from:}}

DKIM_DOMAIN = ${lookup {$sender_address_domain} lsearch {/etc/exim4/dkim_signing_domains}

... and pupulate /etc/exim4/dkim_signing_domains with the domains you
want to have been signed.

But you might even use $sender_address_domain direct. Never use $h_from
for this purpose. First, no header informations are trusted and second
the dkim stuff needs to be done for the envelope sender address, not the
from.

Regards
   Klaus
- -- 
Klaus Ethgen                              http://www.ethgen.ch/
pub  4096R/4E20AF1C 2011-05-16   Klaus Ethgen <Klaus@???>
Fingerprint: 85D4 CA42 952C 949B 1753  62B3 79D0 B06F 4E20 AF1C