questions on Zimbra Mobile with Apple iPhone.
1) is there any log message when zimbra *push* emails to user's mobile devices?
2) in customer's situation, when he only configured 3 or 5 apple iPhone devices, every email will be pushed to the devices quite soon, however, when there're totally 30 devices are configured now, they found zimbra will NOT always push emails to their devices, sometimes it will, and sometimes it won't.
does anyone know how to debug such situation? any log is left when emails are pushing?