关于user unknown的问题

生活就是这样

这是我的/var/log/maillog
Jan 18 08:49:39 mail sendmail[30048]: /etc/aliases: 78 aliases, longest 10 bytes, 802 bytes total
Jan 18 08:49:39 mail sendmail[30053]: starting daemon (8.13.1): SMTP+queueing@01:00:00
Jan 18 08:49:39 mail sm-msp-queue[30061]: starting daemon (8.13.1): queueing@01:00:00
Jan 18 08:49:48 mail dovecot: Killed with signal 15
Jan 18 08:49:48 mail dovecot: Dovecot starting up
Jan 18 08:50:14 mail sendmail[30083]: l0I0o8u3030083: <wangbd@k1c.cn>... User unknown