Knowledgebase: Beta ADM, Beta Apps
How to configure Mail-Server app in ASUSTOR NAS
Posted by Support Team ASUSTOR on 06 July 2014 10:19 PM


  • There are several protocols used in Mail-Server. Please refer to the table below and ensure the required ports are forwarded in advance.


Default Port













  • You must have a registered domain name, or you can apply one from DDNS service provider.
  • There must be a MX (Mail eXchanger) record associated to this domain name.

 We will use as an example to show you how to apply a valid domain name for mail service. 

  1. Find your NAS current WAN IP from ADM > Settings > Ease of Access > DDNS. It is assumed as aaa.bbb.ccc.ddd in the picture below.

  2. Go to and register a new account. Then you will be able to create a unique host name. Have this host name mapped to your NAS current WAN IP by filling it in IP address field.

    DDNS host
  3. Scroll down the web page and find “Mail Options” section. Fill in the complete host name here. Click “Add Host” to save the setting.


  4. Go back to NAS ADM DDNS page, enable the service, select “” as the provider, and fill in your DDNS account information. Click “Apply” and DDNS service should be running on your NAS right away.

    Enable DDNS

Mail server configuration 

  1. Go to ADM > App Central > Beta Apps to find “Mail-Server” app, click “Install”.

    Install App

  2. Activate “Mail-Server” app and go to “SMTP” tab. Enter your registered domain name in “Domain name” field, click “Apply”. Your mail server is up and running now.

    Enable SMTP

Mail client configuration 

We use the well-known mail client software: Thunderbird to demonstrate here.

  1. Launch Thunderbird and click “Email” under “Create a new account”.

    Create a new mail account
  2. In the next screen, click “Skip this and use my existing email”.

    Use existing mail
  3. Enter required information here and click “Continue”. Please note the Email address is “ADM_account@your registered domain name”, and type in the password of the ADM_account in “Password” field.

    My account setup

  4. Thunderbird will connect to specified mail server and start negotiating process. Once the process is completed, the result will be shown. Click “Done” to proceed.

    Mail server negotiation done

  5. You should be able to see the newly added mail box for your ADM account in Thunderbird now.

    Mail client configuration done 

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