Sometimes we get a error Message when using the FTP clients: 421 Sorry, cleartext sessions are not accepted on this server.
Problem: This error mean that the FTP provider has secured the access with Transport Layer Security (TLS) or its predecessor, Secure Sockets Layer (SSL).
Solution:
Change the protocol of the host to “ftpes://”
The configuration will be
Host: ftpes://hostname.com
port: 21
thans a lot for this quick fix..
I am getting same error again… 🙁
Please try with sftp:hostname:port, sometimes the ftpes or sftp will be configured to run in port 22. please check that too.
http://help.yahoo.com/l/us/yahoo/smallbusiness/webhosting/gftp/ftps-04.html#a
Go here. Yahoo explains how to fix it.