Uipath interaction with Windows Temp

I have a robot with full permissions on Windows Temp. He get attachements from mail and put them on windows temp. He edit a docx and then have to send back to mail and delete it.

He edit correctly the document but can’t send it back to mail and can’t delete either. It’s works with another folder but Windows temp seems to bring problem with some interactions. Do you have some information about limitations and/or how to pass these limitations ?