您需要将主机的IP地址添加到“允许的转发器”列表中.
原文链接：https://www.f2er.com/ubuntu/348250.htmlHere is一篇关于如何在Ubuntu下配置的简单文章,它具有拆分文件类型的配置(如debian),因此与官方版本不同.
基本上：
you set
dc_relay_netsunderupdate-exim4.conf.confto the IP address of the machine you want to relay from. Then you do the split config dance and runupdate-exim4.confand you should now be able to relay email from that IP (or range of IPs).
