My Opendkim Seems not right

From: Fred White <subscribe_at_cakafete.com>
Date: Tue, 27 Nov 2012 18:24:39 -0500

Hello List, how can the following be corrected:
Return-Path: <bounce-debian-user=subscribe=cakafete.com_at_lists.debian.org>
X-Original-To: subscribe_at_cakafete.com
Delivered-To: subscribe_at_cakafete.com
X-policyd-weight: using cached result; rate:hard: -7.6
X-DKIM: OpenDKIM Filter v2.6.8 cakafeteinc.propagation.net 896486108C8
Authentication-Results: cakafeteinc.propagation.net; dkim=fail
     reason="verification failed; insecure key"
     header.d=gmail.com header.i=_at_gmail.com header.b=Hv5Dghs/;
     dkim-adsp=none (insecure policy); dkim-atps=neutral

I do not get this from all responses:

Return-Path: <daemon_at_dk.elandsys.com>
X-Original-To: subscribe_at_cakafete.com
Delivered-To: subscribe_at_cakafete.com
X-policyd-weight: using cached result; rate: -7.6
X-DKIM: OpenDKIM Filter v2.6.8 cakafeteinc.propagation.net 9CEF3610920
Authentication-Results: cakafeteinc.propagation.net; dkim=pass
        reason="1024-bit key; insecure key"
        header.d=opendkim.org header.i=_at_opendkim.org header.b=jLSiLRMu;
        dkim-adsp=none (insecure policy); dkim-atps=neutral

Many Thanks
Received on Tue Nov 27 2012 - 23:25:34 PST