Fix error: postfix/sendmail MTA

錯誤訊息

error: postfix/sendmail[3354]: fatal: open /etc/postfix/main.cf: No such file or directory xxxxxxxxxxxxxxxxxxx from MTA

安裝 postfix 相關處理

sudo apt-get install postfix 
sudo nano /etc/postfix/main.cf
sudo chmod 777 /etc/postfix/main.cf
sudo postconf -n > /etc/postfix/main.cf
sudo chmod 644 /etc/postfix/main.cf
sudo systemctl status postfix
sudo systemctl start postfix