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Re: [lemonade] About draft-gulbrandsen-imap-notify-02


----- Original Message ----- From: "Arnt Gulbrandsen" <arnt at oryx.com>
To: <lemonade at ietf.org>
Cc: "Lingyan Wu" <wulingyan_48795 at huawei.com>
Sent: Monday, February 12, 2007 3:08 PM
Subject: Re: [lemonade] About draft-gulbrandsen-imap-notify-02


Lingyan Wu writes:
How about to only send very important and urgent events in unselected mailbox (e.g. the events that can pass outband-notification filters) through unsolicited STATUS response including the event--STATUS(EVENT)?

I _think_ the latest/next sieve notify draft is close to that. At least if there's a new "imap" mechanism. Which there will be - I'm sure Alexey will write a draft.

The sieve notify mechanism then does this:

If the filters pass
  If the user is logged in via IMAP
    notify via IMAP response
  else
    notify outband
  endif
endif


Please look at the following definitions.
o        Filtering results into the following logical types:

§ Type A: Messages filtered out and not accessible by the MEM Client (no notification, no access)

§ Type B: Messages that are accessible by the MEM Client but no outband notification takes place. However, In-band Notifications take place while the MEM Client is connected to MEM Server.

§ Type C: Messages that are accessible by the MEM Client for which notifications (outband or inband) are always sent to the MEM Client.



According to the definition, filters for outband seems more strict than filters for inband. I mean it seems that the messages passing outband filters is subset of the messages passing inband filters. Right or not?
If I misunderstand the definitions, please give corrections and guidance.
If not, maybe the following mechanism is more appropriate.

If the user is logged in via IMAP
  If the inband filters pass
     notify via IMAP response
  endif
else
  If the outband filters pass
     notify outband
  endif
endif


So we just need to add text ensuring that IMAP notify and SIEVE notify will not send the same NewMessage event twice. Which will be really easy to implement anyway. Good.

Arnt





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