I played around a little with http://www.chilkatsoft.com/ ActiveX components. Here is an example based on examples from this page.   #include <FileConstants.au3> #include <MsgBoxConstants.au3> ;~ http://www.chilkatsoft.com/downloads_ActiveX.asp ;~ http://www.chilkatsoft.com/support.asp ;~ http://www.chilkatsoft.com/refdoc/activex.asp ;~ http://www.chilkatsoft.com/refdoc/xChilkatCertStoreRef.html ;~ http://www.chilkatsoft.com/refdoc/xChilkatCertChainRef.html ;~ Email ActiveX Ref