Hi Michael,
At 17:27 04-02-2016, Michael Wise wrote:
If you're going to do something that will break the DKIM signature as a matter of course,
You should remove the DKIM signature, and maybe re-sign it with your own.

You shouldn't break the signature and then forward what was once goodmail with a now busted signature.

The issue with removing a DKIM signature which would get broken is that it is not easy to reverse the removal in future. It is better [1] to treat the "broken" DKIM signature as unsigned.

Regards,
-sm

1. This depends on the receivers you are sending mail to.

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