Although & kmail; can be considered reliable you should keep backups of your messages, & ie; just copy the files and folders in ~/ Mail (including the hidden ones that start with a dot) to a safe place.
Pregovorni zanesljivosti & kmail; a navkljub je priporočeno izdelovanje varnostnih kopij sporočil. & npr; prepiši datoteke ~/ Mail na varno mesto.