Postfix send error

Symptom is no email is being received
tail /var/mail/root contains the following error:
Diagnostic-Code: X-Postfix; unknown user:

When you install postfix if your hostname includes your domain then Postfix thinks its receiving mail for the domain, to fix:
vim /etc/postfix/main.cf
remove [yourdomain.com] from mydestination section

restart postfix and retest
postfix stop
postfix start

Reference:
http://stackoverflow.com/questions/32877196/postfix-thinks-the-system-email-is-local

How to manage an ESXi host from OSX

If you need to manage ESXi hosts using your MAC, with “ESXi Embedded Host Client” you can manage it through the browser!
Simply, SSH into your ESXi host and run the following commands, no need to reboot:

esxcli software vib install -v http://download3.vmware.com/software/vmw-tools/esxui/esxui-signed-4493986.vib

esxcli software vib install -v http://download3.vmware.com/software/vmw-tools/esxui/VMware-Remote-Console-9.0.0-MacOS.vib

Reference:
https://labs.vmware.com/flings/esxi-embedded-host-client