Can you create a messaging send script with email? <snip> This website is messaging website.
Sort of.
Each cell phone provider has its own email format:
You have to know beforehand to which network you will be sending your message, although there are various sites that can do lookups and tell you what network the number is being used on.
http://www.google.com/search?q=cell+phone+provider+lookup
However, if you want to send out messages en masse, the messages will probably be blocked as spam. It is very difficult to get unblocked once you are blocked.