Creating Users & Groups (CentOS) - wollardj/Mandrill GitHub Wiki

When Mandrill is launched as a root process and the MANDRILL_MODE environment variable is set to 'production', the startup code will automatically attempt to become the _mandrill user by calling setuid on its own process. This is currently hard-coded, but may be configurable some day.

sudo groupadd --system munki
sudo adduser --system _mandrill -G munki

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