zabbix服务正常，但未收到sendmail邮件告警

最近的zabbix服务器上的sendmail服务运行正常，但发送邮件失败。

查看日志截取部分显示如下：

May 20 16:58:30 localhost sendmail[31269]: t4K8wUMm031269: from=root, size=226, class=0, nrcpts=1, msgid=<[e-mail]>, relay=root@localhost

May 20 16:58:30 localhost sendmail[31270]: t4K8wUaO031270: from=<[e-mail]>, size=482, class=0, nrcpts=1, msgid=<[e-mail]>, proto=ESMTP, daemon=MTA, relay=wonhot30.com [127.0.0.1]

May 20 16:58:30 localhost sendmail[31269]: t4K8wUMm031269: to=[e-mail], ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30226, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (t4K8wUaO031270 Message accepted for delivery)

后将

/etc/mail/hosts_local_name

/etc/hosts

/etc/sysconfig/network

三者中的hostname统一后，重启sendmail服务恢复正常