Word, like other word processing applications, were really designed for printed output, and on the printed page those highlights don't appear.
Turn off any auto-correct features in your Word, but be aware that recipients may have their auto-correct settings turned on,
Or, convert the document to a PDF file, and send that.
Neither are ideal, but just workarounds.
I just started using Word 2010 and find that in creating documents every time I open it up it has the highlighted areas offering grammar, spelling, etc. correction options even after I made my changes, accepted them and saved them.
My problem is I do not want to be sending out documents someone else opens up and sees the highlighted areas. I have already tested it by sending documents to myself and when I open it up the highlighted areas are there. How do I get Word to stop doing this after I saved the corrections?