Default: ``gpg``.
+ **built_with.<name>**
+
+ Compile time feature <name>. Current possibilities include
+ "compact" (see **notmuch-compact(1)**)
+ and "field_processor" (see **notmuch-search-terms(7)**).
+
+ **query.<name>**
+
+ Expansion for named query called <name>. See
+ **notmuch-search-terms(7)** for more information about named
+ queries.
ENVIRONMENT
===========