In the last few days my junk mail filter has been defeated by messages with an indent before the origin line and an "a." (small "a" followed by a period).  Can anyone help? 
When I receive replies from contacts with localized mail clients, I get, for instance, "SV:" and "VS:" instead of "RE:" and "FW:" as the subject prefix, and Outlook does not group these messages into the conversation. I would like Outlook to treat these messages as a part of the conversation.

/H