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Testing the connection between your mail server and Hosted Email Security (HES) mail servers using the Telnet SMTP session

    • Updated:
    • 3 Oct 2014
    • Product/Version:
    • Hosted Email Security - Inbound Filtering 1.9.8
    • Hosted Email Security 1.9.8
    • Hosted Email Security 2.0
    • Platform:
    • N/A N/A
Summary
Know the steps on how to test the connection between your mail server and HES mail servers when you are not able to send emails. 
Details
Public
Testing the connection between servers will help you determine the exact error returned by the HES Message Transfer Agent (MTA).
You can test the connection using the Telnet SMTP session by sending an email using the command line of the Telnet tool, which is pre-installed in most Windows operating systems.
To test the connection using the Telnet tool:
  1. On your mail server, open the command prompt:
    1. Go to Start > Run or press the Windows key + R.
    2. Type "cmd," and click OK.command prompt
  2. Test the incoming MTA by typing the following command:
    • For EMEA customers: in.hes.trendmicro.eu 25
    • For  non-EMEA customers
      • HES 1.x version: in.sjc.mx.trendmicro.com 25
      • HES 2.0 version: in.hes.trendmicro.com 25
        Incoming MTA
         
  3. Test the relay MTA by typing the following command:
    • For EMEA customers: relay.hes.trendmicro.eu 25
    • For non-EMEA customers
      • HES 1.x version: relay.sjc.mx.trendmicro.com 25
      • HES 2.0 version: relay.hes.trendmicro.com 25
  4. Use the HELO command to specify the domain you are using to send emails.
    HELO local.domain.com (use your fully qualified domain name here)
    The following message from HES MTA will appear:
    "250 mail.server.com Hello local.domain.name pleased to meet you".
  5. Specify the sender using the following command:
    MAIL FROM: your_email@yourdomain.com
    You will receive a reply from HES MTA that says, "250 2.1.5 Ok".
  6. Specify the recipient using the command:
    RCPT TO: recipent_email@recipient_domain.com
    Again, the HES MTA will send a reply that says, "250 2.1.5 Ok".
  7. Start composing the test message.
    1. Type “DATA” and then press Enter.
    2. Type "SUBJECT: [This is a test]" and press Enter twice.
    3. Enter the text of your message. For example:
      This is a test, please ignore.
    4. End your message by putting a single period (.) on a line by itself. Then press Enter.
      You will receive a reply from HES MTA that says:
      250 2.0.0 Ok: queued as XXXXXXXXX
      This means that the message was accepted by HES.
    5. Copy the output of the Telnet session and send it to Trend Micro Technical Support.
  8. Type “QUIT” to exit Telnet.
Below is a sample Telnet SMTP session:Telnet SMTP session
Premium
Internal
Rating:
Category:
Configure; Troubleshoot
Solution Id:
1095409
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