I really like thunderbird. Because it is the only client I know of that has all the features I use: - multiple identities - multiple accounts - a very good s

I really like thunderbird. Because it is the only client I know of that has all the features I use: - multiple identities - multiple accounts - a very good search - imap idle support - nntp client It could be better on a lot of aspects, like the ui looks a bit outdated (I use it on kde, so it does not integrate very well with the rest of the de), the search could use some more filters, and I can not sort folders in the left pane. But apart from that, it has all the bells and whistles a real email client needs to have to make it really useful.