Daern:
I too own an Avtech 760 DVR and am trying to get it to email jpeg images to my email account.
The email works fine, however, I don't get any pictures in the emails - just a .htm file when opened brings me to a login screen where I can view the captured video.
Would you mind sharing your settings with me?
Everything else works fine on my machine... maybe I can help you with your issue once I configure my DVR correctly.
Thanks!