Use the camera icon to create a GIF file, then email that. Even better,
insert this picture into a document and provide some commentary about
the project/Gantt.
Not possible to create a HTML file with tools provided by Project. I've
seen somewhere where someone wrote some code to create a Gantt chart
with HTML Table, so it is possible, but the GIF file approach is so much
better.
Failing that, print the Gantt to a PDF file and email the PDF file.
Hope this is useful to you. Let us know.
rms