John, I'm moving this over to this thread because I think my issues with htmlize-and-send might not be because of any errors in my setup.
When I use John's htmlize-and-send, or any similar function, to attempt to send an html email from org-mode, I get an error from message-send: "Message already sent via mail; resend?" Attmepting to resend fails silently, and the message is neither sent nor saved to archives. Interestingly, the first time I try this in a new emacs session, I get no error message ( though the message doesn't actually get sent). This makes me wonder if there's something wrong with the way mu4e/message/htmlize-and-send is keeping track of messages.
I've attached the minimal mail-test.el that I use to start emacs; I'm using a pretty recent emacs-git with the latest org-mode git, on Arch Linux, with offlineimap and nullmailer (which has a sendmail clone). If anyone out there has a moment to look at my config and tell me if they see anything wrong... I'd aprreciate it. Th