My explanation might be confusing, for which I apologize in advance. I have Spectrum netmail. I recently installed Thunderbird; that went off without a hitch. When I open Thunderbird and try to get it to connect to Spectrum, I put in my full name, email address and password. Thunderbird then comes up with a configuration. However, when I hit "done," I get the following message: "Unable to log in at server. Probably wrong configuration, username or password." I thought this was a Spectrum problem, but after inquiring, they told me it was a Thunderbird problem. I have attempted to connect several times and have checked my username and password carefully to make sure they were correct. I have also attempted to configure manually, and that has also been unsuccessful. However, the hostname (mobile.charter.net), the incoming server port (993) and the outgoing server port (587) are all correct, according to information I saw on the Spectrum website. I'd welcome any suggestions to fix this problem. Thanks in advance.