Hi!

Today my attention was called to RFC 7405 because of the last call I see to promote it to Internet Standard.

In the DKIM/DKIM2 documents we use case-_sensitive_ strings frequently enough, for much that's at the right hand side of a tag-value list item.

With RFC 7405 we could make the formal definition more clear, for example in productions like

sig-name    = "rsa-sha256" / "ed25519-sha256" / x-sig-name

Here and in all other similar places we could make it yet clearer (not only by existing prose elsewhere) that these are case-sensitive by using the %s prefix from RFC 7405.

Hannah.


-------- Forwarded Message --------
Subject: Last Call: Advance RFC 7405 to Internet Standard, add to STD68 (ABNF)
Date:   Mon, 31 Aug 2026 14:24:12 -0700
From:   The IESG <[email protected]>
Reply-To:       [email protected]
To:     IETF-Announce <[email protected]>




The IESG has received a request from an individual participant to make the
following status changes:

- RFC7405 from Proposed Standard to Internet Standard
(Case-Sensitive String Support in ABNF)

The supporting document for this request can be found here:

https://datatracker.ietf.org/doc/status-change-abnf-case-sensitive-to-internet-standard/

The IESG plans to make a decision in the next few weeks, and solicits final
comments on this action. Please send substantive comments to the
[email protected] mailing lists by 2026-09-28. Exceptionally, comments may
be sent to [email protected] instead. In either case, please retain the beginning
of the Subject line to allow automated sorting.

The affected document can be obtained via
https://datatracker.ietf.org/doc/rfc7405/

IESG discussion of this request can be tracked via
https://datatracker.ietf.org/doc/status-change-abnf-case-sensitive-to-internet-standard/ballot/



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--
Hannah Stern

Software Developer
Mail Transfer Development

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