To check if NeoMutt supports Kyoto Cabinet, look for
“kyoto” in the NeoMutt version.
“+hcache” in the compile options
“hcache backend: kyotocabinet” in the NeoMutt version
This feature adds support for using Kyoto Cabinet, the successor to Tokyo Cabinet, as a storage backend for NeoMutt's header cache (hcache). It is enabled at configure time with the --with-kyotocabinet=<path> switch.
