Can't access my Cox email via iMap
Since July 19 2017 I've been unable to download iMap messages from my Cox account. The error messages say either that I've been disconnected from the server or that I'm using too many iMap channels. Regarding the latter, I reset the maximum number of channels to 1 but still get the message.
This is happening on both my home computer and at work. Until this morning I had not changed any settings in my email configuration, but at home this morning I changed the incoming port from 993 to 995 to bring the settings into accord with Cox's latest documentation. But this had no noticeable effect.
I am using Mozilla Thunderbird 52.2.1 on iMacs running Mac OS 10.10.5 (Yosemite).
Can you please shed some light on what's going on and how to fix these problems?