Today changed all W7 Clients from IE11 to IE10. No Problems reported by users up to now. I do not think that the problem is related to the Outlook profiles. We have checked this for a single user, without success wrt the problem. Maybe the new Rendering engine is so optimized that this email verbiage is just cut off due to nonsense Content?
@ColeLT1: Maybe the newer Office version would be a solution, but we have still not decided how to go on with which version. The Office version 2013 is not so convincing in many aspects.