They can if you attach the doc from Mail. If you are sharing the doc from Drive then you can't add a read receipt.
FAQ Category: Drive
Can I share documents I create in Google Docs with people outside of my domain?
Sure, as long as this option has been enabled by your Google Apps administrator. If it is, you can share any of your documents with other students, faculty or friends outside of the York University domain.
Can I import files such as Microsoft Office documents into Google Docs?
Yes, you can import the following types of documents into Google Docs: Microsoft Word (.doc, .docx) Microsoft Excel (.xls, .xlsx) Microsoft PowerPoint (.ppt, .pps, .pptx) Rich Text (.rft) Plain text (.txt) HTML (.html) PDF (.pdf) Adobe Illustrator and Photoshop (.ai, .psd) Autodesk AutoCad (.dxf) Apple Pages (.PAGES) Scalable Vector Graphics (.SVG) PostScript (.EPS, .PS) TrueType […]
Can I really work on a document the same time as someone else?
Absolutely! You can share any type of document created in Google Docs with your colleagues. Then all you can collaborate on it in real-time, each person making their own edits. You not only see other people's changes as they happen, but you can tell who's doing what!