Mail flow in PureMessage for Unix halted after update to SAV for Linux version 9.3.1

  • Article ID: 119865
  • Updated: 09 Oct 2013


Mail flow in PureMessage for Unix has halted after update to Sophos Anti-Virus for Linux version 9.3.1.

To experience this issue all of the following must be true:

  • the system must be running Sophos Anti-Virus for Linux version 9.3.1
  • both PureMessage for UNIX and Sophos Anti-Virus for Linux is running on the same system
  • Sophos Anti-Virus for Linux has on-access scanning enabled

Note: This issue is only affecting a small number of customers.

First seen in
Sophos Anti-Virus for Linux 9.3.1
PureMessage for Unix


This issue is due to a permission change to a /dev/ device in SAV for Linux that the Milter attempts to access before virus scanning is attempted.

We are currently investigating the issue and will provide further information in this article as required.

What To Do

If you experience this issue run the following commands to add the PMX user to the sophosav group.

  1. As the root user run:

    usermod -a -G sophosav <pmx-username>

    For example:  usermod -a -G sophosav pmx6

  2. As the pmx user run:

    pmx-milter restart

If selinux is installed and enabled then an alternative solution may be required.  In this scenario the following will resolve the issue.

  1. As the root user run:

    /opt/sophos-av/bin/savconfig set RestrictProcessexclusions false
  2. As the pmx user run:

    pmx-milter restart


If you need more information or guidance, then please contact technical support.

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