怎样设置mbox?

配置Rmail

;; Reading Mail
(setq rmail-preserve-inbox t)
;;(setq rmail-movemail-flags '("--tls"))
(setq rmail-primary-inbox-list
      '("imaps://abst.proc.do:nivfomuhdxtxdcii@imap.qq.com:993"
      )
(setq rmail-movemail-program "/usr/bin/movemail")
(setq rmail-movemail-search-path "/usr/bin/movemail")

M-x Rmail后报错:

rmail-convert-file-maybe: Invalid mbox file

从命令行手工运行movemail可以正常工作

$ movemail  -v "imaps://abst.proc.do:password@imap.qq.com:993" ~/RMAIL 
movemail: number of messages in source mailbox: 2
movemail: number of processed messages: 2
movemail: number of errors: 0 / 0

在~/RMAIL中开启rmail-mode, 能够正常工作

rmail-mbox-format 是默认设置的 “mboxrd”

Rmail的文档中有一句

  • =mbox=

    Usual Unix mailbox format. In this case, user, pass and port are not used, and host-or-file-name denotes the file name of the mailbox file, e.g., =mbox:///var/spool/mail/smith=.

mbox:///var/spool/mail/smith应该怎样放进配置里?