Basic Postfix Configuration

What default minimal configuration can be done on postfix, check it out below:

Configure in DNS server/provider

mail.sa-bagus.com A record to IP Server

Priority MX to mail.sa-bagus.com

Install

apt-get install postfix

example choose:

internet site: sa-bagus.com

Configure postfix

dpkg-reconfigure postfix

Choose accordingly to your needs like network, limit, and domain.

restart postfix service

now by default inbox will be in /var/mail/ and it is already connected with Linux local account

example adduser emailuser1.

now if example, your Gmail account sends an email to @sa-bagus.com , the email message will be stored default in the /var/mail/

You have default SMTP on port 25, but some cloud providers will block traffic 25 so consider making advanced configuration like SMTPS 465 or 587.

That's.

now even with the default config if your local/cloud server is connected to the internet, it can send and receive email to the public email like Gmail, but maybe if you send the bulk email will mark it as spam, you need an advanced configuration like DKIM, SPX, etc.