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

[Patrick O'Callaghan <poc usb ve>]

On Wed, 2016-05-18 at 01:07 +0200, Ángel González 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-protoco
> l/
> 2015-July/002535.html for an (implicit) confirmation from a google
> employee.

Interesting, thanks for that. As I said, it's not something one could
easily test for but it appears to be the case.

BTW when quoting long URLs, it's useful to do so with the Preformatted
option to avoid line breaks.

> >  
> > > *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.

I think that text basically confirms what I said: "deleting" a message
just removes the label. It doesn't say anything about *expunging*
deleted messages (equivalent to "emptying trash").

> > 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.

That's not the opposite, it's just a different point. I'm talking about
the common operation of deletion, using the MUA's specific action for
that (Ctrl-D or whatever). Moving a message to Trash is something I've
never done so I don't know what the effect is. Maybe I'll try it and
see.

poc