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===Dovecot Idle_Notify===
Poor battery consumption issues has been reported with K9-mail on recent Android systems. It is apparent one way of helping this is to modify the imap_idle_notify setting. The default is in Dovecot, and therefore on SME is 2 minutes.
K9 has an idle refresh of 24 mins but it seems with Dovecot defaults at 2 mins it causes lots of wake ups and battery drain.
This is configurable via a config db property.
Default on install
# config show dovecot
dovecot=service
Quotas=enabled
status=enabled
Set dovecot Idle_Notify to 20 minutes
# config setprop dovecot Idle_Notify 20
# config show dovecot
dovecot=service
Idle_Notify=20
Quotas=enabled
status=enabled
Expand template to update *.conf (can also issue a full reconfigure/reboot)
# expand-template /etc/dovecot/dovecot.conf
# dovecot -a |grep imap_idle_notify_interval
imap_idle_notify_interval = 20 mins
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