On Tue 04/Oct/2022 02:01:12 +0200 Scott Kitterman wrote:
Many normal email operations seem difficult to distinguish from the case you
are trying to address. Signing fields in the envelope may be enough to break
replaying, although it would have other negative consequences.
Scott is right. In general the envelope can contain jack@site-A and
jill@site-B. When the server connects to site-A, it only transmits jack. Jill
would be rejected with something like "Relaying denied". So at site-A, a
signature including the envelope is already broken.
About formatting, don't stuff like:
ARC (RFC8617 (https://www.rfc-editor.org/rfc/rfc8617.html))
If using XML[*], write references like:
ARC (<xref target="RFC8617"></xref>)
Or, if using mmark[†]:
ARC ([@!RFC8617])
Best
Ale
--
[*] https://authors.ietf.org/references-in-rfcxml
[†] https://mmark.miek.nl/
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