said Gene Heskett:
| I just changed kernels on this machine, from 4.9.0.9-rt to 4.9.0.9, | without the rt. Kmail always has a cow over to folders indices, so I | expected to get a message about spam and spam-hold which both get | touched by external scripts or by me moving messages around, but even if | a nuke all the index files and then start or restart kmail, it has the | rebuild done in 15 minutes or so.
remind us whether you're using maildir (good) or mbox (bad). (which appraisals i give based on the ability to recover messages in case of a problem.)