I searched for a solution to capture/reject/accept/send calendar invitations with emacs/notmuch and org-mode. I found one older solution on [reddit](https://www.reddit.com/r/orgmode/comments/5odzem/accept_calendar_invitation_icalics_in_mail) which was not working right out of the box, but I adjusted it to a working solution (at least for emacs 27).
You can find the changes in following repository
\- [https://github.com/hokreb/notmuch-calendar-x](https://github.com/hokreb/notmuch-calendar-x)
for everybody to use.
I am not sure, if the timezone handling is correct, for usage within German timezone, I does not find any problem.
Any improvements for the solution are welcome.