Yesterday, I got the same 530 error, today I can't connect to cPanel.
Status: Resolving address of ustream.x10hosting.com
Status: Connecting to 74.86.133.219:21...
Status: Connection established, waiting for welcome message...
Error: Connection timed out
Error: Could not connect to server
Edit:
Just got access to FTP. This is what it gave me.
Status: Resolving address of ustream.x10hosting.com
Status: Connecting to 74.86.133.219:21...
Status: Connection established, waiting for welcome message...
Response: 220---------- Welcome to Pure-FTPd [TLS] ----------
Response: 220-You are user number 6 of 50 allowed.
Response: 220-Local time is now 09:51. Server port: 21.
Response: 220-This is a private system - No anonymous login
Response: 220-IPv6 connections are also welcome on this server.
Response: 220 You will be disconnected after 15 minutes of inactivity.
Command: USER name
Response: 331 User name OK. Password required
Command: PASS ********
Response: 530 Login authentication failed
Error: Could not connect to server