pop3验证问题

xggabc

$ telnet localhost 110
> Trying 127.0.0.1...
> Connected to localhost.
> Escape character is '^]'.
> +OK <2055.1082627448@xxxxxxx>
> user kna
> +OK
> pass xxxx
> -ERR authorization failed
> Connection closed by foreign host
但是用netstat和ps都是正确的
why