Comment 1 for bug 367341

Update: After more experimenting I was able to do a POP connection by enabling the "Use secure authentication" tick box in the server settings. Odd. None of the other servers require this, nor do any of the other clients I mentioned in my first posting. IOW, Thunderbird is the only client that requires the "secure authentication" to talk successfully to the Internet Rex POP server.

Not sure if any other action need be taken at this point in as much as very few of these POP servers are utilised. Nonetheless some coder may want to have a look at the original stated problem.