On 6/22/14, 1:52 PM, Peter Shute wrote:
Will gmail recognise the message as a duplicate even if the list has added a 
prefix to the subject line, and a footer?

Peter Shute


To my knowledge, the ONE thing that gmail checks is the Message-ID: header, if that matches, it is a duplicate and dropped. It is not checking for the messages being "identical", it is detecting "duplicates", as defined by the RFCs for Email (if two messages are different, they must have different Message-ID:s).

--
Richard Damon

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