I've set up my own little IMAP server where all my mail messages end up (from many different addresses). Through Mozilla Thunderbird I access my messages from both my PC at home, and my laptop at school. Because it's IMAP, all messages are stay on the server and I can work with exactly the same mails no matter where I am. If I want, I could install a spiffy web-based interface too.

I've started doing some basic GTD with it too. IMAP is definatly showing its advantages here; I need to work with two different computers each day, and it's nice to have all my tasks available everywhere.

However, I'm getting annoyed by a major shortcoming in Firefox, I can't edit any message. There's a workaround by moving the message to the drafts folder, editing it, saving it, and moving it back, but this breaks a few things.

I did some research regarding this missing functionality: http://forums.mozillazine.org/viewtopic.php?p=2142938

No real practical solution.

That's why I wanted to ask, anyone here know a good e-mail client that allows me to edit any message and supports IMAP properly?