I can imagine there are many, in day-to-day use I find Thunderbird to be one of the worst e-mail clients I've ever used. Slow, unstable, makes simple things har

I can imagine there are many, in day-to-day use I find Thunderbird to be one of the worst e-mail clients I've ever used. Slow, unstable, makes simple things hard (try to configure an LDAP address book) and many basic features simply don't work (IMAP search for example).