RockyLinux 9.2 sensmail allow relay

#安裝sendmail

yum install sendmail

#修改設定

cd /etc/mail

vi sendmail.cf

將這一行mark起來(allow remote connect)

#O DaemonPortOptions=Port=smtp,Addr=127.0.0.1, Name=MTA

vi relay-domains

新增要寄信的IP，Ex: 192.168.10.29

#啟動sendmail

systemctl start sendmail

systemctl enable sendmail

#開啟防火牆

firewall-cmd --permanent --add-port=25/tcp

firewall-cmd --reload