After some experiments, my twtxt client now creates files in a Maildir.
Then you can use a tool like mutt to read it. It doesn't have to go
through an actual mail server -- it just dumps the files there.
I have used this approach in the past for other things and it works
really well. Mutt can also do the heavy lifting when it comes to
threading: You just have to put an "In-Reply-To" header in the file.
And, of course, this integrates seaminglessly with my notification
system: It just checks whether there is some "buffy" mailbox, be it POP3
or IMAP or whatever.
