For others reading, box.occams.info is my Mail-in-a-Box for my own mail.
It says the box offers Anonymous DHE ciphers. I clicked refresh and the grade changed from C to A. (Generally it’s a good idea to repeat what you see here on the forum because now that the results are refreshed, there’s no record of what it used to say.)
See Drop SSLv3 support in Postfix. That’s a different thing, but same response.