My company restricts access to the outside via an (HTTP) proxy.
My Firefox settings for the proxy are working (proxy address + port as well as "use this proxy server for all protocols"). However, if I use the same settings for the proxy in Thunderbird I cannot access any NNTP groups. (I use one unsecured server over port 119 and one secured server (eternal-september.org) over port 563 -- both do not work via this proxy.
What can I do to read+post text NNTP messages? (I would like to avoid Google Groups as it doesn't work properly for some moderated newsgroups.)
Oh, and note that all of the NG I access are actually work related :-)