On Wed, Jun 16, 2021 at 05:59:16PM -0700, Jeremiah Rothschild wrote:
> To triple check my sanity, I created a brand new VM and confirmed the
> behavior.
> So anyone should be able to easily reproduce this.
>
> * Fresh CentOS 8.4 install
> * Choose "Minimal" base environment
> * Defaults for everything else
>
> # yum -y update
> # yum -y install postfix mailx
> # systemctl start postfix
> # echo "somealias: /tmp/somefile" >> /etc/aliases && newaliases
> # echo "test" | mail somealias@localhost
> # ls /tmp/somefile
Just don't assume /tmp or /var/tmp are the same between services.
Postfix on RHEL 8 is configured with private /tmp. To be exact:
| PrivateTmp=true
| CapabilityBoundingSet=~ CAP_NET_ADMIN CAP_SYS_ADMIN CAP_SYS_BOOT
CAP_SYS_MODULE
| ProtectSystem=true
| PrivateDevices=true
Bastian
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