However, the client has installed a new ftp server, and we can no longer drop more than a zero byte file. In a manual test using FireFTP, we get the same error of "TLS session of data connection has not resumed or the session does not match the control connection". A test using Filezilla client works however. From what I can tell, this is because of needing to enforce TLS session resumption and the Filezilla client does this..
Has anyone dealt with and solved this in Coldfusion?