On Sat, Sep 20, 2025, at 21:17, Richard Clayton wrote: > >Worse, whatever list is developed now will be inadequate eventually. > > only if someone invents a new Trace header field, but we could change > the I-D to specify Received: and Return-Path explicitly (which is sort > of the case already) rather than implicitly because they are Trace > header fields.
We must absolutely specify those two explicitly in the document, since code will fail to interoperate unless it agrees exactly on the headers which are excluded. Explicit is good. Bron. -- Bron Gondwana, CEO, Fastmail Pty Ltd / Fastmail US LLC [email protected]
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