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: t4K8wUMm031269: from=root, size=226, class=0, nrcpts=1, msgid=, relay=root@localhost
May 20 16:58:30 localhost sendmail: t4K8wUaO031270: from=, size=482, class=0, nrcpts=1, msgid=, proto=ESMTP, daemon=MTA, relay=wonhot30.com
May 20 16:58:30 localhost sendmail: t4K8wUMm031269: to=admin@test.com, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30226, relay= , 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
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