No Injection-Date: if Message-ID: present?

Thomas Hochstein inn-workers at
Sun Sep 10 18:58:31 UTC 2017

Russ Allbery wrote:


Thanks for pointing me in the right direction!

>    11.  If the proto-article already had an Injection-Date header field,
>         it MUST NOT be modified or replaced.  If the proto-article had
>         both a Message-ID header field and a Date header field, an
>         Injection-Date header field MUST NOT be added, since the proto-
>         article may have been multiply injected by a posting agent that
>         predates this standard.

I see. (I had to read up a bit on the meaning of Injection-Date. I
didn't know a posting agent was allowed - and in some cases - forced
to add that header.)


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