Re: [Evolution] Yet another: The odd behaviour of Gmail accounts

[Ángel González <angel 16bits net>]

On 2016-05-17 at 21:08 +0100, Patrick O'Callaghan wrote:
> On Tue, 2016-05-17 at 20:38 +0200, Tom wrote:
>
> [...]
>
> >      C. Gmail simply throws away the second one (remember that
> > Gmail is really an interface to a database) though haven't checked
> > this. 
>
> This has been hypothesised but I can't think of a reliable way to
> test it. Given that the Gmail server side would need to check
> messages for duplicates to detect this, it may not be true.

It *is* checking for duplicates and merging both emails (even though
there may be small differences) when it considers them "similar
enough", see http://mailman13.u.washington.edu/pipermail/imap-protocol/
2015-July/002535.html for an (implicit) confirmation from a google
employee.


> > *DELETED* 
> >      A. Messages that are deleted from a folder via IMAP (except
> > for
> >         those in [Gmail]/Spam or [Gmail]/Trash) only have folder
> > label
> >         removed and still exist in [Gmail]/"All Mail". 
>
> Are you sure? I deleted and expunged a test message using Evo and the
> Gmail web interface removed it from All Mail.
>
> >      B. Saving deleted messages to [Gmail]/Trash folder causes
> > deleting a message in all folders.
>
> Not sure I understand what you mean by this.

That it is not showed on any other folder but [Gmail]/Trash, even if
there were several copies not deleted.


This section seems a copied from the official explanation at https://su
pport.google.com/mail/answer/78755?hl=en Would be interesting to note
the parts that are officially documented, too.






> It's worth noting that Gmail's use of labels means that the same
> message may appear in multiple IMAP folders. There is still only one
> copy of the message. Deleting such a message from one folder simply
> removes the corresponding label and doesn't remove the message from
> other folders. A bit like filenames on Unix in fact. Is that what you
> meant by the above comment regarding [Gmail]/Trash?

Actually, I think it does the opposite. If you really delete an
instance of a file (by moving it to the real Trash), then all of its
instances are removed.


Regards