Configuration and activation of SMTP in ASMB

This article is about the SMTP-dispatch (Simple Mail Transfer Protocol) and how to activate, configure and set up email notifications correctly in the Web-GUI of the ASUS ASMB11-iKVM.

Requirements

• SMTP-server that functions
• ASUS-mainboard with integrated ASMB-module
• network access on the BMC-websurface

In the following example, an internal SMTP-server without user-authentification is used.

User administration

A valid recipient address must be stored for at least one user before SMTP can be used. Only then, notifications can be delivered.

• 
  Switch to Settings after login
• 
  Open User Settings
• 
  Select a provided user that should receive notifications.
• 
  Enter the desired recipient-email-address .
• 
  Confirm and safe changes with the current password.

SMTP-settings

After the user rights have been set, the SMTP-parameters can be configured for the mail dispatch.

• 
  Open SMTP settings via settings.
• 
  Enter a sender address under Sender Email ID (for example Node-02@Hamburg). Activate SMTP-Support and the SMTP-data (Server, Port, sender).

Hint: If the SMTP-server requires an authentification (SASL / STARTTLS), a certificate must be provided. Some ASMB-versions only support encrypted SMTP (Port 25).

Filter for notifications

Suitable event-filters must be installed so that the ASMB knows for which events it has to send emails.

• 
  Switch to Platform Event Filter via Settings.
• 
  Determine under Event Filters for which events a notification should be sent.
• 
  Select under LAN Destinations the target channel over which the notifications are sent.
• 
  Configure LAN Channel 1 and assign it to the recipient or user. The test dispatch can be started with the black letter symbol.
• 
  If everything is entered correctly, the test email should arrive.

Summary

The email notifications can be easily activated via SMTP in the ASMB-module:

• user must possess a valid recipient address
• SMTP-server data must be entered correctly
• configure event-filter and LAN-destinations
• send test mail to verify functions

Multiple users / different recipients

The ASMB-module enables to save users with the own email address. This allows the following:

• Administrators receive general system notifications
• Technicians only receive hardware referred alert notifications
• Monitoring-systems receive automatized error reports

This enables a defined, targeted and role-based notification.

Troubleshooting of SMTP-problems

The following aspects should be verified, if no test email arrives:

• blocked firewall / SMTP-port?
• user without email address→ dispatch generally fails
• SMTP-authentification necessary? → certificate may be required
• DNS-problems? → Better to enter mailserver via IP on a trial basis
• event filter disabled or incorrectly configured
• verify event log under Server Health → Event Log
• test SMTP-connection manually (see Test TCP Port 25 (smtp) access with telnet)

Author: Adrian Zillner Adrian Zillner has been working in Technical Service at Thomas-Krenn AG since May 2025. He is responsible for supporting customers and answering questions about technical issues.

Translator: Alina Ranzinger Alina has been working at Thomas-Krenn.AG since 2024. After her training as multilingual business assistant, she got her job as assistant of the Product Management and is responsible for the translation of texts and for the organisation of the department.