I just asked a question about whether it was possible to write a web-page-checking code and run it from free web server, and one supporter answered and said that it was possible
It is totally possible on Google AppEngine.
I am not sure by you mean "no files" on GAE: there is definitely access to files but in "READ ONLY" mode.
What you have to do is fetch the remote WEB page (through urlfetch API) and use the email API to send it.