I have a client with a dozen forms using CF7. Not sure when, but within the last two weeks, all of the Mail data has disappeared from the admin screens, and the forms do not function.
I've checked in the database and all the Mail data is there for each form.
This was moved from a development server - both are running WP3.6 and CF7 3.4.2. In an effort to solve this, I've since updated CF7 on the production server to run 3.5.2, but no joy.
Checking now to see if client has added anything to the production server that I'm not aware of.
The client had activated five new plugins - tried deactivating all of them, but no change.
Deactivated all plugins except CF7 - still no Mail data showing on admin screen.
BTW, no Jetpack installed and no other contact form plugins.
For what it's worth, the two sites are with two different hosting companies - off now to compare mySQL versions etc.