Configuration
Advanced Configuration for Mail delivery

Introduction

Outgoing email (for example app.telemetry notifications) can be deliviered using a so-called smarthost or relayhost. It is possible to configure this in the management center in SMTP-Settings.
Some email servers however require additional configuration.

Attention: Please also note that “localhost” must be specified as the mail server in the Client Service used so that the local Postfix server is used for authentication. In the Management Center, go to the menu item “Configuration”, then to the tab “Client Service” and activate “Advanced Settings”. In the section “Alerting Service Settings”, you will find the setting “Mail Server” in your “Alert Collection”:

Configuration of Advanced Settings

Advanced settings for the service responsible for email delivery (postfix) are read and applied on service startup from all files in /config/postfix with the .conf extension.

Changes in those files are only applied after a restart of the postfix service and are persistent across product updates.

systemctl restart postfix.service

Use-Case: Setup SMTP Authentication

Some email servers only relay emails after successful authentication. In this case the following settings in /config/postfix/override.conf can be used to set this up.

smtp_sasl_auth_enable = yes
smtp_sasl_tls_security_options = noanonymous
smtp_sasl_password_maps = hash:/config/postfix/sasl_pass.map

The required credentials need to be placed in the file /config/postfix/sasl_pass.map using the following format:

hostname_of_the_relay username:password

Currently the following methods are supported for authentication and are automatically negotiated with the mailserver: PLAIN, LOGIN