On Mon, 21 Aug 2017, at 09:34, Hector Santos wrote: > On 8/18/2017 8:53 PM, Bron Gondwana wrote: > >> ... >> >> And the message still arrives at receiver with a valid ARC >> chain, just>> via badsite.com instead of site3.com. > > The same receiver? If so, wouldn't this be a duplicate message when > the same receiver can see the same 5322.Message-Id?
There is nothing stopping you changing the 5322.Message-Id - it's not encoded in the AS or AAR. Bron. -- Bron Gondwana, CEO, FastMail Pty Ltd br...@fastmailteam.com
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