Many people complain that their Yahoo mail won’t attach files. But if you don’t notice these indicators, it means that the document has not been attached. It also has links for downloading or removing the attachment. When a document is attached, it appears as an image thumbnail or file name at the email’s bottom. A message, namely ‘Adding an attachment’, also helps you to monitor this process. It is through a progress bar beside the attachment. When you attach a document to the email in Yahoo, you can find its progress being loaded.