[Question] Remove These Headers and Outlook conversation view

[Mark Sapiro]

On 02/15/2018 01:08 PM, Eoin Kim wrote:
> 
> Much appreciate it. Is this DUPLICATEDELIVER situation happening only in Exchange server or Linux mail services will do the same?


Most MUAs and MDAs will accept multiple messages with the same
Message-ID:. One big exception is gmail/googlemail. In that case the
message is accepted by the incoming MTA, but if the Message-ID: matches
one already in the recipient's "All Mail", the new message will be
discarded without any notice.

See <https://wiki.list.org/x/4030680> and some of the Google links
therefrom for more on this.

-- 
Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan