So it's the CHM who is barring people from using the name. The relevant clause must be this: "Neither the name of Computer History Museum nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission." Is this really "BSD license", if the name is off-limits? This looks like an extra clause to me. Honest question.
EDIT: also, that clause mentions the names of contributors, not of the actual software. So they would have to argue that Eudora is barred by "contributor Eudora Inc." -- does that company even exist anymore?