RE: nnimap and receipts for mails

[Steve Harris <sharris@primus.com>]

Have you checked out RFC 2298 ("An Extensible Message Format for Message
Disposition Notifications")?
Here's one copy: http://sunsite.auc.dk/RFC/rfc/rfc2298.html
I know that MS Outlook (at least through Outlook 98) does not actually
respect the headers described in this RFC, despite the fact that it
sometimes decorates its messages with similar headers. The real magic gets
triggered by the attached TNEF file.