okass 在版块 Linux平台 中发起了话题 sendmail报错：“My unqualified host name ( name ) unknown； sleeping for retry“ 2年, 8个月前
1> tecent企业邮箱发送失败，查看系统邮件日志，发现如下错误:
Dec 11 14:28:08 rdosrv sendmail[22803]: My unqualified host name (rdosrv) unknown; sleeping for
retryDec 11 14:35:23 rdosrv sendmail[22944]: My unqualified host name (rdosrv) unknown; sleeping for
retryDec 11 14:35:57 rdosrv sendmail[22962]: My unqualified host name (rdosrv) unknown; sleeping for
retry竟然是无法解析rdosrv，有点意思，直接去ping rdosrv自然是没问题，突然想到好像FQDN里面规定域名必须用”.”结尾，难道是hosts里面少了一个”.”，尝试修改hosts文件：
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
192.168.1.28 rdosrv. rdosrv
启动sendmail，刷一下就启动了
2>发送邮件时发生错误 (535 Error: authentication failed, system busy )
解决办法:https://blog.csdn.net/MyMBS/article/details/89017493
