Re: [Imap-protocol] Gmail IMAP and X-GM-MSGID

I’m not sure how much you would gain by reduplicating across accounts.  
One way you could try to de-duplicate could be to get a hash (sha1?) of the content of the email.

--  
Hoa V. Dinh


On Wednesday, July 16, 2014 at 7:54 PM, Christine Spang wrote:

> Hi Saqib,
>  
> Thanks for the quick response.
>  
> I'm trying to maximally deduplicate Gmail messages amongst an (arbitrary) set of Gmail accounts synchronized locally. Seems like you can deduplicate within-account easily based on X-GM-MSGID, but cross-account deduplication is much harder.  
>  
> I'm using Gmail IMAP.
>  
> --Christine
>  
>  
> On Wed, Jul 16, 2014 at 7:43 PM, Ali, Saqib <[email protected] (mailto:[email protected])> wrote:
> > Hello Christine,
> >  
> > As far as I know:  
> > 1) X-GM-MSGID is not unique.
> > 2) It is possible.  
> > 3) No (as far as i know)
> >  
> > Can you tell us what you are planning to use the X-GM-MSGID for?
> >  
> > Are you using IMAP or Gmail REST API to access the Inbox?
> >  
> > Saqib
> > http://hivemined.net
> >  
> >  
> >  
> > On Wed, Jul 16, 2014 at 7:29 PM, Christine Spang <[email protected] (mailto:[email protected])> wrote:
> > > I know that some of the Gmail IMAP devs are on this list, so might be a good place to ask a few questions about what assumptions one can make about X-GM-MSGID with Gmail IMAP.
> > >  
> > > * Is X-GM-MSGID globally unique across all of Gmail? (I assume no, given sharding.)  
> > > * Can the same message in different accounts have the same X-GM-MSGID?
> > > * Do X-GM-MSGID values associated with messages ever change? (Based on the Gmail API docs about messageId, seems not?)
> > >  
> > > --Christine  
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> >  
>  
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