;; 2.1. At elmo-folder-process-crosspost, setup `reads' slot from
;; `elmo-crosspost-message-alist'.
;; 2.2. remove crosspost entry for current newsgroup from
;; `elmo-crosspost-message-alist'.
(let (cross-deletes reads entity ngs)
(dolist (cross elmo-crosspost-message-alist)
;; 2.1. At elmo-folder-process-crosspost, setup `reads' slot from
;; `elmo-crosspost-message-alist'.
;; 2.2. remove crosspost entry for current newsgroup from
;; `elmo-crosspost-message-alist'.
(let (cross-deletes reads entity ngs)
(dolist (cross elmo-crosspost-message-alist)