iOS 9 Mail Day's to Sync (not showing all)

Zextras,

Before I had on option to sync all mail, however with the latest version and iOS 9 I only get the option to set a max of 30 day's
is there a fix for this?

Ive tried removing all connections from the account in Zextras Admin and setup my iPhone again but keep having the same issue.

Thanks in advance,

Maarten