I set up 2 separate WordPress installs on the same domain for a couple of landing page registration pages. (Different themes, different logins, the client wanted to keep the registration data separate which is why I set up different installs).
Both forms use Gravity Forms for submission. Both are set to go to the same recipient. One of the landing pages will send an email notification after submission, and the other does not, and I'm a little confused as to why that is. The notification settings are configured identically, and both forms record entry submissions just fine. I'm kind of at a loss with support, since we use the GF plugin on other sites on our server that submit and notify via email correctly.