How to build your SMTP server

 sudo hostnamectl set-hostname mail.notuuk.com

sudo nano /etc/hosts    ( navigate to the last line and add ur domain mail.yourdomain.com) 

ctrl x     y   enter

hostname

sh <(curl https://cyberpanel.net/install.sh || wget -O - https://cyberpanel.net/install.sh)

RECORDS TO ADD

type: A  name: @    ipv4: IP off proxy status ttl: auto

type: A  name: mail    ipv4: IP off proxy status ttl: auto

type: A  name: www    ipv4: IP off proxy status ttl: auto

type: A  name: www.mailserver    ipv4: IP off proxy status ttl: auto

type: A  name: www.mail    ipv4: IP off proxy status ttl: auto

type: mx  name: @    mailserver: mail.yourdomain.com IP off proxy status ttl: auto

type: txt

type: txt