Thunderbird can't connect securely to x.y.com because the site uses a security protocol which isn't enabled

Mozilla Thunderbird

After installing Thunderbird 2.0 I started getting the above error message upon attempting to connect to a secure newsgroup server that I had been using successfully in Thunderbird 1.5. The issue is that Thunderbird 2.0 has disabled certain secure protocols which are considered less secure by default though the error message doesn’t really help you resolve the issue. Here is what I did to gain access to this server:

  1. Start Thunderbird
  2. Select Tools|Options
  3. On the Advanced page
  4. Click “Config Editor…” button
  5. For the news server I was trying to get to I had to enable the following security property “security.ssl3.rsa_rc2_40_md5” so I typed that into the Filter edit box and double clicked it to toggle it from false to true.Close
  6. Close the Config Editor and click OK on the options dialog.

Now I’m able to get to the secure newsgroup server.