On 25/05/2010 18:37, Ian Eiloart wrote:

> No, and of course a site needn't reject ADSP mail with broken signatures.
> Indeed, to protect it's members from unwanted unsubscriptions, it might be
> better to drop the email than reject it. But, then the sender might never
> discover what they're doing wrong.

Worse, such a configuration would do collateral damage: other "broken 
ADSP" cases (forwarders which aren't mailing-lists in the sense that 
we're describing) would lead to silent message loss.


> If the recipient rejects the message,
> then the list should be able to bounce back to the sender, since it was
> originally properly signed.
>    

Ideally, but without a reliable indication by the receiver that the 
refusal was for DKIM failure, there's no easy way for the MLM to know 
which bounces to return to the sender.

- Roland

-- 
   Roland Turner | Director, Professional Services Group
   BoxSentry Pte Ltd | 3 Phillip Street #13-03, Singapore 048693
   Mobile: +65 96700022 | Skype: roland.turner
   [email protected] | http://www.boxsentry.com/

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