Category: MAIL SERVER

Architecture We Are Building SPF – Allow your server to send email In your domain DNS (for example yourdomain.id), create a TXT record: Field Value Host @ Type TXT Value v=spf1 ip4:103.xx.xx.xx mx -all Replace 103.xx.xx.xx with your Postfix server’s public IP address. Meaning: Install OpenDKIM Configure OpenDKIM Edit the configuration file: Ensure the following…

Set hostname (REQUIRED) Postfix is very sensitive to the system hostname. Edit /etc/hosts: Add: Verify: The output must be: Install Postfix When the setup wizard appears, choose: Check Postfix service Postfix must be listening on port 25. Basic Postfix hardening Edit the configuration file: Ensure the following settings: Restart Postfix: Test local email delivery Check…