The "From" field is automatically populated when it is blank or incomplete

- Updated:
- 11 Oct 2017
- Product/Version:
- InterScan Messaging Security Suite 7.1 Linux
- InterScan Messaging Security Suite 9.1 Linux
- InterScan Messaging Security Virtual Appliance 8.2
- InterScan Messaging Security Virtual Appliance 8.5
- InterScan Messaging Security Virtual Appliance 9.0
- Platform:
- Linux - Red Hat RHEL 3 32-bit
- Linux - Red Hat RHEL 3 64-bit
- Linux - Red Hat RHEL 4 32-bit
- Linux - Red Hat RHEL 4 64-bit
- Linux - Red Hat RHEL 5 32-bit
- Linux - Red Hat RHEL 5 64-bit
- Linux - Red Hat RHEL 6 32-bit
- Linux - Red Hat RHEL 6 64-bit
- Linux - SuSE version 10
- Linux - SuSE version 9
- Windows 2003 Enterprise Server
- Windows 2008 Enterprise Server

Summary

When an email passes through a Linux-based InterScan Messaging Security product (IMSx) and the "From" (sender) field is blank or incomplete, it gets populated with the FQDN of the IMSx server.

For example:

The original from field is blank: Return-Path: <>
The from field will become: From: < Attachment@mail1 .domain.net >

Where:

mail1.domain.net - the FQDN of the IMS* server

Details

This behavior is part of the cleanup procedure of Postfix.

If you do not want this behavior to occur on your server, run the following commands in the Linux shell:

postconf -e append_at_myorigin=no
postfix reload

The commands will prevent Postfix from populating the "From" field when it is blank or incomplete.

For more information on Postfix parameters, refer to the following topic: Postfix Configuration Parameters.

Rating:

Category:

Configure; Deploy; Install; Upgrade; Migrate

Solution Id:

1057503

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