单项选择题
A.自己所在域的域名B.自己设置的域名C.被转发到的邮件服务器的域名D.以上都不对
A.mydomainB.myoriginC.relay_hostD.mynetworks
A.systemctl status dovecotB.systemctl start dovecotC.systemctl stop dovecotD.systemctl enable dovecot