X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=doc%2Fman7%2Fnotmuch-properties.rst;h=a7d91d674a89f92e37989e6bb1ca3846839360c2;hp=f70ffb3ca3ae706b7f74393eb48b1f0d6375d93d;hb=4b1a8fd18364a6e1f1a6e987c64aae760505999e;hpb=0bb05ff693737c5b91d6a64f6209984a6c418c46

diff --git a/doc/man7/notmuch-properties.rst b/doc/man7/notmuch-properties.rst
index f70ffb3c..a7d91d67 100644
--- a/doc/man7/notmuch-properties.rst
+++ b/doc/man7/notmuch-properties.rst
@@ -47,13 +47,102 @@ CONVENTIONS
 Any property with a key that starts with "index." will be removed (and
 possibly re-set) upon reindexing (see **notmuch-reindex(1)**).
 
+MESSAGE PROPERTIES
+==================
+
+The following properties are set by notmuch internally in the course
+of its normal activity.
+
+**index.decryption**
+    If a message contains encrypted content, and notmuch tries to
+    decrypt that content during indexing, it will add the property
+    ``index.decryption=success`` when the cleartext was successfully
+    indexed.  If notmuch attempts to decrypt any part of a message
+    during indexing and that decryption attempt fails, it will add the
+    property ``index.decryption=failure`` to the message.
+
+    Note that it's possible for a single message to have both
+    ``index.decryption=success`` and ``index.decryption=failure``.
+    Consider an encrypted e-mail message that contains another
+    encrypted e-mail message as an attachment -- if the outer message
+    can be decrypted, but the attached part cannot, then both
+    properties will be set on the message as a whole.
+
+    If notmuch never tried to decrypt an encrypted message during
+    indexing (which is the default, see ``index.decrypt`` in
+    **notmuch-config(1)**), then this property will not be set on that
+    message.
+
+**session-key**
+
+    When **notmuch-show(1)** or **nomtuch-reply** encounters a message
+    with an encrypted part, if notmuch finds a ``session-key``
+    property associated with the message, it will try that stashed
+    session key for decryption.
+
+    If you do not want to use any stashed session keys that might be
+    present, you should pass those programs ``--decrypt=false``.
+
+    Using a stashed session key with "notmuch show" will speed up
+    rendering of long encrypted threads.  It also allows the user to
+    destroy the secret part of any expired encryption-capable subkey
+    while still being able to read any retained messages for which
+    they have stashed the session key.  This enables truly deletable
+    e-mail, since (once the session key and asymmetric subkey are both
+    destroyed) there are no keys left that can be used to decrypt any
+    copy of the original message previously stored by an adversary.
+
+    However, access to the stashed session key for an encrypted message
+    permits full byte-for-byte reconstruction of the cleartext
+    message.  This includes attachments, cryptographic signatures, and
+    other material that cannot be reconstructed from the index alone.
+
+    See ``index.decrypt`` in **notmuch-config(1)** for more
+    details about how to set notmuch's policy on when to store session
+    keys.
+
+    The session key should be in the ASCII text form produced by
+    GnuPG.  For OpenPGP, that consists of a decimal representation of
+    the hash algorithm used (identified by number from RFC 4880,
+    e.g. 9 means AES-256) followed by a colon, followed by a
+    hexadecimal representation of the algorithm-specific key.  For
+    example, an AES-128 key might be stashed in a notmuch property as:
+    ``session-key=7:14B16AF65536C28AF209828DFE34C9E0``.
+
+**index.repaired**
+
+    Some messages arrive in forms that are confusing to view; they can
+    be mangled by mail transport agents, or the sending mail user
+    agent may structure them in a way that is confusing.  If notmuch
+    knows how to both detect and repair such a problematic message, it
+    will do so during indexing.
+
+    If it applies a message repair during indexing, it will use the
+    ``index.repaired`` property to note the type of repair(s) it
+    performed.
+
+    ``index.repaired=skip-protected-headers-legacy-display`` indicates
+    that when indexing the cleartext of an encrypted message, notmuch
+    skipped over a "legacy-display" text/rfc822-headers part that it
+    found in that message, since it was able to index the built-in
+    protected headers directly.
+
+    ``index.repaired=mixedup`` indicates the repair of a "Mixed Up"
+    encrypted PGP/MIME message, a mangling typically produced by
+    Microsoft's Exchange MTA.  See
+    https://tools.ietf.org/html/draft-dkg-openpgp-pgpmime-message-mangling
+    for more information.
+
 SEE ALSO
 ========
 
 **notmuch(1)**,
+**notmuch-config(1)**,
 **notmuch-dump(1)**,
 **notmuch-insert(1)**,
 **notmuch-new(1)**,
 **notmuch-reindex(1)**,
+**notmuch-reply(1)**,
 **notmuch-restore(1)**,
+**notmuch-show(1)**,
 ***notmuch-search-terms(7)**