linux postfix问题

健少org

我建立完了一个null client 的电子邮件服务器：我配置文件是这么设置的：
mydomain = yjj.com
myorigin = $mydomain
myhostname = www.yjj.com
mydestination =
relayhost = [x1.yjj.com]
inet_interfaces = loopback-only

但是我发邮件就是去不了指定的服务器求解答

错误的日志：Feb 25 19:13:06 yjj postfix/smtp[26119]: 9B4FB31DA64C: to=<yjj@x1.yjj.com>, relay=none, delay=2445, delays=2445/0.04/0/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=x1.yjj.com type=AAAA: Host not found, try again)
Feb 25 19:18:06 yjj postfix/qmgr[25728]: 237F031DA652: from=<yjj1@yjj.com>, size=298, nrcpt=1 (queue active)
Feb 25 19:18:06 yjj postfix/smtp[26165]: 237F031DA652: to=<root@x1.yjj.com>, relay=none, delay=1170, delays=1170/0.04/0/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=x1.yjj.com type=AAAA: Host not found, try again)