---
title: Mailbaby for Postfix
description: This is a general set up for postfix. This can also apply for plesk linux running postfix. To begin some files in the postfix config directory must be created. This varies based on the install, but often is simply /etc/postfix…
url: "https://www.mail.baby/tips/mailbaby-for-postfix/"
updated: "2021-10-29"
category: Tutorials
---

# Mailbaby for Postfix

This is a general set up for postfix. This can also apply for plesk linux running postfix.

To begin some files in the postfix config directory must be created. This varies based on the install, but often is simply /etc/postfix which will be used in this documentation.

 

Create a file **/etc/postfix/header_custom**and add the following line:

> **/^Received: (.*Authenticated sender:)([^)]*)(.*)/i PREPEND X-Sender-id: $2**

Save the file. This will be used to include an authorized header X-Sender-id on emails.

Create a password file called **/etc/postfix/sasl_passwd**

Add in the smtp server and the smtpusername:password in the format of

**relay.mailbaby.net username:password**

The login information will show in the client portal.

Set the permissons and create the postmap hash with the command below.

> **chown root:root /etc/postfix/sasl_passwd; chmod 600 /etc/postfix/sasl_passwd; postmap hash:/etc/postfix/sasl_passwd**

Edit **/etc/postfix/main.cf** and add to the bottom of the config file

> **relayhost = relay.mailbaby.net:25**
>  **smtp_sasl_auth_enable = yes**
>  **smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd**
>  **smtp_sasl_security_options = noanonymous**
>  **smtpd_sasl_authenticated_header = yes**
>  **smtp_tls_security_level = encrypt**
>  **smtp_header_checks = regexp:/etc/postfix/header_custom**

Save the file. Finally check the config with

> **postconf**

and restart postfix.