ietf-dkim
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Re: [ietf-dkim] EAI and 8bit downgrades

2014-07-09 18:28:06
DKIM deals only with domains, so as long as you can convert the d= to puny code 
if needed, then you are fine…

I would also suggest that d= should contains only puny code (ASCII), i= could 
be problematic, you may want to ensure it does not have a local part in your 
implementation (e.g. i=@example.com)

If you use authentication-results header, for the DKIM part, the header.d= 
should be puny code too.

On Jul 9, 2014, at 3:50 AM, Wietse Venema <wietse(_at_)porcupine(_dot_)org> 
wrote:

Jiankang Yao:
Is there any RFC which deals with EAI DKIM ?
how to deal with EAI message in the DKIM?
Do we have a decision about it?

According to RFC 6530, in-transit downgrading of messages (described
in detail in RFC 5504) is eliminated from EAI. Downgrading to an
ASCII-only form may occur before or during the initial message
submission, or after the delivery to the final delivery MTA.

Thus, instead of being downgraded in-transit, mail is returned as
undeliverable.


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