Set Up Postfix Send-Only SMTP Server for Multiple Domains on Ubuntu

A reader asked me: “Hi LinuxBabe! I love your tutorials! I couldn’t find any good tutorial on the web about setting up Postfix as a send-only mail server using multiple domains. Do you know how to do it? Thx in advance!” In this article, I will show you how to do that on Ubuntu 18.04, 16.04, 19.04 server.

Use Case

You have a website/web application that needs to send transactional emails to users (such as password-reset email). Mostly likely, there’s no need for users to reply to these email, or if they reply, the reply emails will be sent to your dedicated mail server. In this case, you can set up a send-only SMTP server on the web server using Postfix, which is a popular SMTP server software.

Read full tutorial here: https://www.linuxbabe.com/mail-server/postfix-send-only-multiple-domains-ubuntu