- If true, when encountering an encrypted message, try to
- decrypt it while reindexing. If decryption is successful,
- index the cleartext itself. Be aware that the index is likely
- sufficient to reconstruct the cleartext of the message itself,
- so please ensure that the notmuch message index is adequately
- protected. DO NOT USE ``--try-decrypt=true`` without
- considering the security of your index.
+ If ``true``, when encountering an encrypted message, try to
+ decrypt it while reindexing, storing any session keys
+ discovered. If ``auto``, and notmuch already knows about a
+ session key for the message, it will try decrypting using that
+ session key but will not try to access the user's secret keys.
+ If decryption is successful, index the cleartext itself.