What is the Maximum Number of Email Addresses per Domain to Stay Safe for Outbound Campaigns?

Hey guys, I have got question I want to send 10k+ emails a day.. I have got basic knowledge about sending outbound campaigns. And I need your help.. How many email addresses I can create per warmed up domain to be safe? F.e. I have got right now 3 domains and 3 email addresses for each domain. So it is 9 addresses and I want to send 60 emails per address to stay safe, it is 540 emails sent per day. What is maximum of email addresses per domain to stay safe? Thanks :)