You use Gmail and receive a lot of attachments (JPG, GIF, TXT, DOC, PDF, etc) but Gmail don’t provide the option to sort your files by file type. Here is a method how you can sort them, by using the Gmail Search Mail facility.

Type in this search operator has:attachment following with your file format. If you are looking for document file, your search command will be this.

has:attachment doc

And Gmail will result you all mail with .doc attachment.