Safe emailing of software -

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Some people bought their application through PayPal (which is not DRM) I did not include updated functionality within (bad idea.) Now when an update has happened, I thought I could email all those old customers to install the updated version link. Unfortunately, this idea is open to attack (just copy and post link to the forum) so that it has been rejected. The app I bought with a secure link, which are not so open to attack, how can I email them all?
Thanks, Isaac

Maybe consider this:

  • Upload an updated package to your website / FTP Protect it.
  • Send a link to the login page for each customer
  • There should be a parameter on the querystring in each link - a GUID probably, for one time use. Ask the user to enter their email address, and make sure that they match the GUID registered for that email address.
  • Once downloaded, do not download more with that email address GUID; Write a small DB (i.e. sql)
  • If the customer needs to download it more than once, then email them to you. You can send them a new download link with the new GUID. All of them will be tied to their e-mail address.
  • The user should not even be obliged to email you. Rebuild a new GUID, but cache the user on the 2 or 3 Auto Generated GUID.
  • What statistics do you have now and how often have you downloaded it?

This pattern can be replicated on products that you want to present to download, and for each different version, it would be great to take advantage of this scheme for all those circumstances. .


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