I've had an issue come up with a client where contact forms are not completing the send -- instead, they get the spinning arrows, then nothing. This is a recent issue, and they are my only client reporting this issue. I currently have all my clients on WP 3.5.2 due to the reports of conflicts with WP 3.6, and am using the most current version of CF7. This says to me that the only variable is the hosting, since only this one client uses Dreamhost.
Any ideas as to what's happening here? I've read it's a spoofing fix, but the forms are already set up to generate the "From" email address as the client's, with a "Reply-to" from the user. Again, nobody else is reporting this error.
Any advice would be most appreciated.