On Sun, Feb 08, 2009 at 11:13:53AM -0500, Sahil Tandon wrote: > On Sun, 08 Feb 2009, Bastian Blank wrote: > > Yes. It will break the complete mail handling of the client. _Never_ > > ever touch a message id. > Do explain how adding/replacing a valid Message-ID only to submitted mail > will "break the complete mail handling of the client".
I mean replacing or deleting already set Message-Id headers. And it will break MUA driven thread handling and similar things which is based on the original submitted ID. > And how do you > reconcile your last sentence with section 8.3 of RFC 4409? Please read the RFC again. This sentence only speaks about _adding_ this header, not about replacing or deleting it. There is however no other point which allows arbitrary modifications to the messages. Bastian -- If a man had a child who'd gone anti-social, killed perhaps, he'd still tend to protect that child. -- McCoy, "The Ultimate Computer", stardate 4731.3