When is an eMail attachement automatically downloaded in iOS? From my expierience iOS downloads an attachment up to the size of about 50 kB automatically when on a 3G network, on a WLAN larger files are downloaded automatically (up to around 150 kB).
However I cannot find this documented by Apple and I have users complaining with high roaming bills that tell me big attachments get downloaded automatically.
Our users are connected to Microsoft Exchange 2010 by ActiveSync.
The problem is difficult to reproduce and I'm looking for ways to nail or solve this?