• The server protocol (as used my mu4e) has seen a number of updates, to allow for faster rendering
• The processed number in the indexing statistics has been renamed into checked and describes the number of message files
• The internals of the message handling in mu have been heavily reworked;
• you can now also set an environment variable MUHOME instead of --muhome
• the info command now includes information about the last indexing operation
• the verify command for checking signatures has been updated, and is more informative
• a new command fields provides information about the message fields and flags for use in queries
• new message flags personal to search for “personal” messages
• message sexps are now cached in the store, which makes delivering sexp-based search results (as used by mu4e) much faster.
• the old mu4e-view is gone; only the gnus-based one remains
• the mu4e headers rendering is much faster (a factor of 3+), which makes displaying big results snappier
• undo is now supported across message-saves
• full changelog

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