I branched the NppExport plugin to create HTML clipboard compatible with web mail, to allow paste with syntax highlight inside mails.
You can find it on https://github.com/APerricone/NppExport/releases/tag/v0.2.9.1,
for any trouble, please feel free to open an issue ;)
@APerricone You may want check against https://github.com/chcg/NPP_ExportPlugin
Just for https://github.com/bruderstein/npp-plugins-x64/blob/master/plugins/plugins64.xml#L752
very good, maybe I can integrate my modifications with yours and make a pull request.
I will do it when I will have some time