Re: [Evolution] Evolution pinging IMAP gmail

[Rick Leir <rleir cirruscomputing com>]

On Wed, 2014-02-12 at 19:20 +0100, Ambrogio De Lorenzo wrote:
> Il giorno mar, 11/02/2014 alle 10.13 +0000, Patrick O'Callaghan ha
> scritto:
> > On 10 February 2014 15:45, Ambrogio De Lorenzo <ogio spam gmail com> wrote:
> > >> Fetchmail supports IMAP as well as POP (see for example:
> > >> http://daemonforums.org/showthread.php?t=5590) so I still think it's a
> > >> possible workaround even if not ideal..
> > > Yes I know, but if I read a message with Evo, it remain to be read on
> > > other devices.
> > 
> > Not sure I understand. Do you mean that fetchmail does not mark the
> > message as Read on the server? Marking a message as Read is something
> > the IMAP server does automatically. It would be different if you
> > wanted to flip the state to Unread, since AFAIK fetchmail doesn't
> > support that. However I haven't used fetchmail in a long time so I may
> > have this completely wrong. I do know there's a fetchmail option to
> > leave messages on the server or to delete them, but I forget which is
> > the default.
> Hi poc,
> I mean that if I read a message with evolution connected to an IMAP
> server, in a few seconds I will see it read also on other devices.
> This is not true if I fetch mails.
>
> Bye
>  Ambrogio
>
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This quote is from
http://fetchmail.berlios.de/fetchmail-man.html#6
>     The IMAP code uses the presence or absence of the server flag \Seen to decide whether or not a message is new. This isn’t the right thing to do, fetchmail should check the UIDVALIDITY and use UID, but it doesn’t do that yet. Under Unix, it counts on your IMAP server to notice the BSD-style Status flags set by mail user agents and set the \Seen flag from them when appropriate. All Unix IMAP servers we know of do this, though it’s not specified by the IMAP RFCs. If you ever trip over a server that doesn’t, the symptom will be that messages you have already read on your host will look new to the server. In this (unlikely) case, only messages you fetched with fetchmail --keep will be both undeleted and marked old.

There is an example dialog showing the \Seen IMAP flag:
 http://en.wikipedia.org/wiki/Internet_Message_Access_Protocol#Dialog_example

HTH -- Rick

http://CirrusComputing.com/