Mark Robinson writes:

Yes. Exactly how did you manage to telnet to noname.net's mail server, since this domain doesn't have one?

So, to summarize: you are having problems sending mail to some mail server. Ok, fine.

But, rather then give full details, you choose to replace real data in your logs with random made-up nonsense. Since all the key data from the logs have been ommited, the only real data that's left are the exact times when you've had those errors, which really doesn't mean much.

So, since you've chosen to omit all the key data, you'll just have to figure it on your own. You can't really expect much help when the essence of your question is, essentially "I can't send mail to some random mail server."

Telnetting to this mysterious mail server only proves that the initial connection succeeds. 'Connection unexpectedly closed' indicates that the remote host closed the connection at some point later in the process, so you'll need to send the exact sequence of commands Courier would normally send, when attempting to deliver mail to this mail server, to find out which specific command the remote server is barfing on.