Larry's extra suggestions are refinements on this: they mean you don't necessarily have to assemble your own email completely; they also mean the acknowledgement page is one step away from the POSTed details i.e. refreshing it won't cause the email to be sent twice. There may be other security issues I'm not aware of, but I certainly bow to the right and proper way of doing things. But as a first attempt, something like:
would probably do you well. I make that 20 lines, which I too have cut and paste a bit from other sources!
Very interesting. Thank you.
Freddie