- "Should notmuch save/postpone in plaintext messages that seem
- like they are intended to be sent encrypted
-(i.e with an mml encryption tag in it)."
+ "Whether to allow saving plaintext when it seems encryption is intended.
+When a message contains mml tags, then that suggest it is
+intended to be encrypted. If the user requests that such a
+message is saved locally, then this option controls whether
+that is allowed. Beside a boolean, this can also be `ask'."