Attention MDR Customers: New Case Submission Flow

As of March 18, 2025, there is an updated process flow to submit MDR-related cases. Please visit this article for details.

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To resolve the issue, prevent Postfix from automatically adding the FQDN.

Open the command line interface of the IMSVA logged in as root.
Go to /opt/trend/imss/etc/postfix.
Edit main.cf using the "vi main.cf" command.
Press letter I to insert a text and add the entry "append_to_myorigin = no" anywhere on the main.cf.
Press ESC and wq!, and then press ENTER to save the changes.
Restart the Postfix by typing "Postfix Restart", and then press ENTER.
Send a test email. The "@[imsva server name]" should not appear.

Keywords: append,fqdn on email,delete fqdn when sending mails,avoid @imsva server name,disable automatic IMSVA append

"@imsva.(server name)" appears on the Recipient or CC field of an email in InterScan Messaging Security Virtual Appliance (IMSVA)

Product / Version includes:

Interscan Messaging Security Virtual Appliance9.0 , Interscan Messaging Security Virtual Appliance8.5

Last updated: 2025/03/17

Solution ID: KA-0003901

Category: Configure , Troubleshoot

Summary

When you send an email with a wrong format, the recipient will see "@imsva.(server name)" on the Recipient or CC field. Below is an example:

Click image to enlarge.

To resolve the issue, prevent Postfix from automatically adding the FQDN.

Open the command line interface of the IMSVA logged in as root.
Go to /opt/trend/imss/etc/postfix.
Edit main.cf using the "vi main.cf" command.
Press letter I to insert a text and add the entry "append_to_myorigin = no" anywhere on the main.cf.
Press ESC and wq!, and then press ENTER to save the changes.
Restart the Postfix by typing "Postfix Restart", and then press ENTER.
Send a test email. The "@[imsva server name]" should not appear.

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