I'll get on my soapbox and state that text/calendar mime attachments to e-mail is a horrific way to manage events and/or invites. Also this is currently the bane of my existence because no mail reader makes it easy to manage the many text/calendar attachments I receive. I think the RFC's involved could be and should be used by calendaring software independently of e-mail, the two should never have been combined.
END SOAPBOX Regardless, I want to make it easier to manage text/calendar mime attachments in mutt and there are several features I'm considering working on to do this: 1. The easiest approach is to use attachments, however it's not currently possible because multipart/alternative is not recursively counted by the attachments code, and these text/calendar attachments are typically children of multipart/alternative. To fix this I can make a setting which toggles this behavior, so I can count all members of multipart/alternative and change my attachments settings to only count text/calendar. 2. Another option is to implement a new limit, specific for finding emails which contain text/calendar, this could sort of be a duplicate of using attachments with ~X, but perhaps the attachment counting code could be isolated and re-used for some more specific limits to be added? 3. A third thing I've been considering is adding more specific support to index_format for this, again, using attachments and %X could potentially do this, but it could be nice to have a specific option for finding and highlighting e-mail that has text/calendar mime attachments In all cases, the bodies of every e-mail must be inspected, so performance will not be great if your mailbox is not local. I don't see any way around this unless there is some secret header that I am unaware of. If nobody has any better ideas or constructive feedback, I'll probably start with number 1 and go from there. -Andrew
