using mailto to send email with an attachment

Nope, this is not possible at all. There is no provision for it in the mailto: protocol, and it would be a gaping security hole if it were possible.

The best idea to send a file, but have the client send the E-Mail that I can think of is:

  • Have the user choose a file
  • Upload the file to a server
  • Have the server return a random file name after upload
  • Build a mailto: link that contains the URL to the uploaded file in the message body

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