It seems that the issue of duplicate copies of sent items is well documented on the forums and it's a problem I'm running into using Windows Live Mail 2011.  This is because both the server and the mail client are each saving a copy in the Sent folder.

I understand that there is no option to switch this off on the server and so I must use the option in WLM to switch that off instead.  However, I use four different email accounts in WLM, only one of which is is through Zoho.  The others use the more-common practice of not saving a copy to Sent, therefore I need the client to do so.  So if I uncheck the box in settings to stop Zoho duplicates, I will have zero copies of sent items for my other accounts.  

How should I get around this?

Chris