In previous tutorials we discussed how to quickly set up a full-featured mail server using iRedMail or Modoboa, and we also learned how to set up SMTP relay with Postfix SMTP server to bypass port 25 blocking or IP blacklists. However, you might not want to set up your entire email server to use relay host. We can configure Postfix transport map and relay map so that some emails are delivered via relay host, other emails are sent directly to recipients

#mail server #linux server #postfix #smtp relay