It means that everyhting esle is working fine, but no emails are going through K-9.

server: 127.0.0.1 port: 9999 username: your.real.pop3.server/110/your_real_user_name

With this settting it will definitely go through K9!!! I can not imagine how it possibly could overcome K9, while it is running on port 9999, on 127.0.0.1.

I’ve done all of that, in fact I’ve done all of the stuff below, from:
http://keir.net/k9_expert.html
but still no good

Change the POP3 server port to 9999.
Change the POP3 server to 127.0.0.1.
The POP3 account user name should be changed to incorporate the original POP3 server, port and user name values into one long string, separated by a “/” character. Here’s an example:
Suppose your original account user name value was robin and the original POP3 server was pop.west.cox.net and the original POP3 port number was 110. The new user name entry would now look like
pop.west.cox.net/110/robin