I notice this from "Exim-users Digest, Vol 165, Issue 9": DKIM: d=exim.org s=d201802 c=relaxed/relaxed a=rsa-sha256 b=1248 [verification failed - body hash mismatch (body probably modified in transit)]
Installation: Debian vanilla -- Regards, Martin Nicholas. E-mail: reply-2...@mgn.org.uk -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/