It seems like a poor implementation choice to be enforcing something which
is not part of the spec :-), especially when there are parenthetical
comments and references to things like ARC-MULTI to warn you against
leaping to foot-shooting enforcement choices.
Here's what the spec says:
3. Validate the structure of the Authenticated Received Chain. A
valid ARC has the following conditions:
1. Each ARC Set MUST contain exactly one each of the three ARC
header fields (AAR, AMS, and AS).
I don't see where it says "except you can ignore the ones that don't
validate particularly if they have funky algorithms."
The perl ARC module checks for dup headers and I don't think that's
unusual.
Regards,
John Levine, [email protected], Taughannock Networks, Trumansburg NY
Please consider the environment before reading this e-mail. https://jl.ly
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