On Sat, 5 Jan 2008, Andrew Haveland-Robinson wrote:
> No, not relying on gmail, just noticed it didn't verify. Perhaps signed
> messages should be delimited to protect against appendices, and made clear
> where the authentication begins and ends?
> Like the OSI 7 layer model, can't dkim not make use of wrappers and
> encapsulation to preserve integrity during transmission/forwarding?

DKIM does have ways to do that (e.g. the "l=" tag), plus the mailing list 
manager or whatever is munging the message enroute could simply re-sign 
the mail after making the changes it wants to make.  I don't think gmail 
is using either method at the moment.

> I used a couple of dkimi test addresses... my test messages did verify ok,
> however my verification of the reply from [EMAIL PROTECTED] gave:
> Authentication-Results: gaia.haveland.com; dkim=permerror (verification
> error: signature timestamp in the future) [EMAIL PROTECTED]
>
> My ntp source is a nuclear physics research institute, and I'm sure my time
> is accurate so I think someone ought to check the machine.

That means your dkim-filter checked the timestamp in the signature against 
its view of local time and found that they're out of order (i.e. the 
signature had a timestamp later than what you think the current time is) 
by enough of a difference to complain about it (see the "ClockDrift" 
configuration option).  Clearly though if your clock is correct then the 
signing machine's clock is out of whack.

> I will try and get it to do a core dump and get a trace.

That would be ideal.

-MSK

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