Hi,
Your plugin is fantastic! We used it on our WP sites but a move by one of our web hosts last week make CF7 stop working. His new servers require more email authentication, and his solution was to point me to "WP Mail SMTP" plugin to make CF7 work the way his servers require.
I installed the SMTP plugin, and have it set up to show "true" in testing, but the form on the site is not showing "sent" just a spinning arrow on SUBMIT. Got any help?