we have a problem with the mobile sync.
When using Apple devices (IOS 6.x and IOS 7.x) we can sync calendar and contacts but not mails.
We get all directories and we get all mails we the configured line of header lines (e.g.4), but if we try than to read the whole mail we get the error
"Mails can not be loaded from server".
We tried mails with very small content and large mails.