Deactivating the theme (BeTheme from Muffin Group) seems severe. CF7 is bundled AND updated with CF7 (and is on our site) AND we have the exact same settings on three other websites on our server (same server) using the same email server and same plug ins, and those sites are fine.
I have also uninstalled CF7 and reinstalled CF7 with the same issues, so not sure what’s really going on.
I have deactivated nearly all the plugins, and it still doesn’t work.