Simply use openssl to generate a RSA key pair of the length you need. Use 
the privat key in the ASSP-DKIM config and configure your DNS using the 
public key.
There are no certificates involved in DKIM, only the key pair is required.

Thomas





Von:    "John Wolf" <jwo...@gmail.com>
An:     Assp-test@lists.sourceforge.net
Datum:  16.02.2018 07:30
Betreff:        Re: [Assp-test] Problems getting Dkim signing working



I tried sending this earlier and got a message saying to try again later.  
So here ot is again...

On Feb 15, 2018 10:48 AM, "John Wolf" <jwo...@gmail.com> wrote:
As an update to this, it appears the WIX who hosts our DNS does not 
support 2048 bit DKIM keys. They say if you try to do that long of txt 
record it will get cut off at 255 characters From the number of characters 
in the key I believe ASSP is using a 2048 bit key.  Is there some way to 
generated 1024 bit keys for it to use instead of the 2048 bit key?


Thank you,

John

On Wed, Feb 14, 2018 at 4:12 PM, John Wolf <jwo...@gmail.com> wrote:
Hello Everyone,

I am trying to get ASSP to sign outgoing messages with DKIM.  

I am running ASSP 2.6.1 on Ubuntu Linux

I have checked the box to tell it to sign the messages and gone into the 
dkimconfig.txt file and filled in the first section with:

 <somevaliddomain.com>
  <mail>
    Algorithm=rsa-sha1
    Method=relaxed/relaxed
    Headers=Message-ID:From:Subject:To:MIME-Version:Content-Type
    KeyFile=/usr/share/assp/certs/server-key.pem
    Mode=DKIM
  </mail>
 </ somevaliddomain.com > 

The keyfile line points to the private key file generated when assp was 
installed.

Is there anything I messed up in that file?  The rest of it is as it was 
before. The only difference is our domain is in where somevaliddomain.com 
is.

Thanks for any help...

John Wolf


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