Do you need to send a unique key to each person?
If not, you could always use mailman (see your Cpanel mail section) and let them all know,or at least point them to a page that contains their license info
yeah, i need a unique key.
looks like my options are:
1. generate the keys on my local machine, then email them (all 7500) to the users. this might run afoul of LP's spam policy, simply by the number of emails.
2. write a web app that will create a license based on user input (validated against my records). this will require the perl Crypt::RSA module (or some other public key/digital signature algorithm - i'm putting off deciding on the exact algorithm until i find out what LP can do).