I have noticed in various threads that people discuss setting up their gmail to sync up, or check for mail, once every 30 mins/hour/etc. I can't for the life of me find where to do this...all I can find is turning auto-sync on or off...I'd like to be able to set my gmail to only check for mail once every 30 minutes, if that's possible. I'm probably just being stupid, but any help would be appreciated. Thanks.