I've been dealing with web hosts for the last 18 years. Not once have I ever dealt with a problem like this with FTP. Each time I try to connect, it says "no such host is known."
User name: firstname.lastname@example.org
It's like this on all FTP clients. I've read that GoDaddy is pretty horrible when it comes to FTP. I hope not, but so far it seems to be the deal. Has anyone dealt with this same issue? If so, how did you fix it?
I'm assuming you have given DNS propagation at least up to 72 hours before trying via DNS? Have you tried via IP?