Hi all, I would like to make a feature request regarding IMAP Idle support.
Currently when a client triggers Idle support, Dovecot then sends 'OK Still Here' messages every 2 minutes. This is apparently to prevent NAT systems killing the tcp connection and disconnecting the client. However, while this may be fine for desktop clients, this rapidly drains the battery life of mobile clients such as phones. Unfortunately, the timing control on this behaviour is a c define at the top of cmd-idle.c and is only adjustable at compile-time. I have experimented with this define and find a timeout of 20 minutes between 'OK' messages is perfectly adequate for my system setup and results in a significant battery saving for my Nokia 6120c (increasing from ~ 6 hours to ~ 55 hours from full charge to low battery warning).
Therefore, can you please make the timeout changeable from the config file, even if it defaults to the current 2min timing, so admins supporting mobile users can balance battery life with a need to prevent killed tcp connections.
Thanks Robert Goldsmith --- GnuPG public key: http://www.Far-Blue.co.uk
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