Prolateral Consulting Ltd
Prolateral Consulting Ltd
Knowledgebase: outmail
How to setup a Mail Relay in Postfix


How to setup a Mail Relay in Postfix?
How to setup a SMTP Mail Relay in Postfix?


Follow the guide below to configure Postfix to use outMail as a Internet Mail Relay.

This article already assumes your Postfix system is able to send emails externally and that you are already have a terminal connection to your server with the necessary access rights to manage and administor postfix.

First you need to create a password file for postfix to use. Create a file called /etc/postfix/relay_passwd and add the following lines to that file OUTMAILUSERNAME:OUTMAILPASSWORD

where OUTMAILUSERNAME and OUTMAILPASSWORD are the (case-sensitive) information provided when you set up your account.

To enable postfix to use the outMail service at the prompt type the following

postconf -e
postconf -e smtp_sasl_auth_enable=yes
postconf -e smtp_sasl_password_maps=hash:/etc/postfix/relay_passwd 
postconf -e smtp_sasl_security_options=noanonymous
postconf -e smtp_sasl_mechanism_filter=plain,login
postmap /etc/postfix/relay_passwd 

For the above changes to take effect the postfix service will need restarting (service postix restart)

Summary of server details

Outgoing server

As provided in your signup email.

Outgoing server protocol


Outgoing server port

25, 587, 2525 or 8025

Authentication Type

Basic Authentication


As provided


As provided

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