cmew utility creates a Message-ID database file with SQLite 3 for Mew.
db_file is a database file name. (default: "~/Mail/id.db")
maildir is a mail directory name. (default: "~/Mail")
ignore_regex is a regular expression for the mail directory names to not create the database. (default: "^\./casket$|^\./casket/|/\.")
target_folder is a target folder. Information about messages contained in this
folder only are updated.
The options are as follows:
Full update. Unless this option is specified, incremental update is used.