postmaster老是收到该提示，怎办？

Subject: Cron <root@mail> /home/vpopmail/bin/clearopensmtp 2 > &1 > /dev/null
X-Cron-Env: <SHELL=/bin/sh>
X-Cron-Env: <HOME=/root>
X-Cron-Env: <ATH=/usr/bin:/bin>
X-Cron-Env: <LOGNAME=root>

/bin/sh: syntax error near unexpected token `&1'
/bin/sh: -c: line 1: `/home/vpopmail/bin/clearopensmtp 2 > &1 > /dev/null'