Apple mail crashes when selecting an inbox
Apple Mail is crashing, for certain inboxes, at specific points in the file. So when I scroll to a certain date, it will crash. So I deleted all messages of that date, and now it crashes on a different date.
So I cannot identify a particular bad email it does not like. It is as if it is crashing because it reaches a certain point in the file.
If I stay with latest emails it is ok. But of course as soon as I do a search function, it hits the place it does not like, and crashes. How do I find out what it does not like.
I tried a rebuild, to no avail.
(All the messages work fine on my iPad.)
OSX 10.11.6
(cannot change computer, otherwise all my software will stop working...)
Thanks,
RE
iMac 21.5″, OS X 10.11