Head to Settings > Automations & scenes and click “Create automation” to get started. Find your sensor and use the “started detecting motion” trigger as your “When” action.

It typically costs between $600 and $1,500 to build a brick mailbox, though the national average cost is $1,100. The exact cost to build a brick mailbox will depend on the type and size of the mailbox ...

Did you unblock the PF Mailboxes from serving hierarchy? You shouldn't have to set a default PF MBX for users to make it work. ..and yeah the default PF DB is only for when you still have 2007 or 2010 ...