[ietf-dkim] Corner cases and loose ends, was , draft-vesely-dkim-joint-sigs

[Murray S. Kucherawy]

> -----Original Message-----
> From: ietf-dkim-bounces at mipassoc.org [mailto:ietf-dkim-bounces at mipassoc.org] On Behalf Of Al Iverson
> Sent: Monday, September 27, 2010 11:18 AM
> To: DKIM List
> Subject: Re: [ietf-dkim] Corner cases and loose ends, was , draft-vesely-dkim-joint-sigs
> 
> It's hard to imagine a large, DKIM-checking mail provider, like, say,
> Yahoo, doing that mid-transaction.

I think the options being discussed are:

a) Accept the whole message and then take DKIM validation and filtering action after returning 250 to DATA; or

b) Return a 5xx to DATA after doing DKIM validation when being strict about DKIM or ADSP.

I don't think anyone is suggesting to break the SMTP sequence.

> Do you have any data/insight on how to quantify "common as dirt"? I'm
> doubtful of your claim without it.

Both implementations exist.  In fact, OpenDKIM can be set to operate in either mode listed above.