I'll bet nothing will work very good since Thunderbird is built on the old Eudora framework. The new upgrade of Zone Alarm has prevented me from sending or receiving mail using Eudora 6.2.3. I finally had to turn
Zone Alarm off just to get my e-mail. It appears that since Eudora is no longer going to be supported, Thunderbird
may be my next e-mail program, but not unless I can get it to work with Zone Alarm.