When I want to join a pdf file to a message sent on my Yahoo mail box, it does not work. After a few minutes, I receive a red message saying (in French) an import error occured. And I see another message saying (in French) ''please check the internet connection because we cannot communicate with your inbox mail box''. I can load any kind of other files without problems. On Internet Explorer, the pdf files are loaded easily. I tried in safe mode, deleted all the cookies, and I still have the same problem, only with Mozilla. Thanks for your help.