(setq
    gnus-fetch-old-headers        t
    gnus-always-read-dribble-file t

    mm-discouraged-alternatives '("text/html" "text/richtext")

    gnus-user-date-format-alist '((t . "%Y-%m-%d %H:%M"))
    gnus-summary-line-format "%U%R%z %(%&user-date;  %*%-23,23f%) %B%s\n"

    gnus-sum-thread-tree-vertical        "│"
    gnus-sum-thread-tree-leaf-with-other "├> "
    gnus-sum-thread-tree-single-leaf     "╰> "
    gnus-sum-thread-tree-indent          " "
    gnus-sum-thread-tree-single-indent   ""
    gnus-sum-thread-tree-root            ""
    gnus-sum-thread-tree-false-root      "○ "
    )

(setq gnus-thread-sort-functions
      '((not gnus-thread-sort-by-number)
        (not gnus-thread-sort-by-most-recent-date)))