[mail-vet-discuss] What is the A-R header really for?

[Eliot Lear]

Charles,
>
> -1
>
> It would be stretching RFC2119 beyond its breaking point to use MUST
> NOT for those two.
>


RFC 2119 says:

>    Imperatives of the type defined in this memo must be used with care
>    and sparingly.  In particular, they MUST only be used where it is
>    actually required for interoperation or to limit behavior which has
>    potential for causing harm (e.g., limiting retransmisssions)


This has not just a little potential of causing harm.

Eliot