I have tested using outlook express from a windows server in my deve environment, using mail on the dkim test box, and using alpine

my DNS records show up on brandoncheckett test as such

Message contains this DKIM Signature:
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dkimtest.reyrey.net;
s=default; t=1301417449;

Signature Information:
v= Version: 1
a= Algorithm: rsa-sha256
c= Method: relaxed/relaxed
d= Domain: dkimtest.reyrey.net
s= Selector: default
q= Protocol:
bh= g3zLYH4xKxcPrHOD18z9YfpQcnk/GaJedfustWU5uGs=
h= Signed Headers: To:Subject:Message-Id:Date:From
b= Data: vHrFZQTBl1DOSfvcx0ir5VORt7PRRPL/InG6+Dsq7YXmr6RESygt3NBstPIZawxVW

Public Key DNS Lookup

Building DNS Query for default._domainkey.dkimtest.reyrey.net
Retrieved this publickey from DNS: v=DKIM1; g=*; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDERR/0XNoaE7dWr0zvsJCGqMFUGEw4Rlez1u6QZUfNV2YdlxDhNYrB3iibSjvrUnonNZvZDp7dHx943WPuPhXbAbo035nKsn/tDJIRpGPbKZ4LTIe7WEC5LtYYyChMB0fLdqCGwkkI4HF3ofdK+kyAUk/J25CoftFxBH+XhAyKPQIDAQAB

Validating Signature

result = fail
Details: message has been altered

On Tue, Mar 29, 2011 at 1:55 PM, Todd Lyons <tlyons@ivenue.com> wrote:
Back onlist...

On Tue, Mar 29, 2011 at 10:46 AM, brandon murphy
> I am using dkim-milter.
> even using open-dkim it brings up these errors.

Ok, that's good to know.  Which testing services are you using?  Can
you give us a domain and selector so that we may verify that your DNS
is configured properly?  If we can't see your dns text records, then
neither can the systems which are doing verification.

> I have sendmail preloaded on the server, I stop that service to use postfix.
> my apologies for the confusion with that. postfix loaded is straight out the
> box postfix. no masquerading is being used to my knowledge.

Ok, so you're using postfix to do this.  I know that recently I've
seen cases where someone had to force postfix to only process a
message through milters once, but I do not recall the exact scenario.
I suggest viewing the opendkim mailing list archives to see if you can
spot anything postfix related that might make sense to you.

Regards...      Todd
"It is the nature of the human species to reject what is true but
unpleasant and to embrace what is obviously false but comforting."
"You might be a skeptic if you have pedantically argued the topic of pedantry."