setup mta-smtp multi-instance server

I need install and setup a mta-smtp server on a fresh server (i can put on windows or linux as freelance request) Prefer postfix in multi-instance mode, with this schema master postfix: receive all email, dkim sign, route to instances based on some postfix rules and limits / | \ child postfix instances (each instance bind to one ip address): limits per domain, send to random mx This smtp will be setup for send 100k emails per hour without be marked as spammer You must have a reliable SMTP server CAN SPAM compliant for send emails without be marked as spammer Setup Dkim on server level (at dns domains i will do) it will use for send emails from 10 domains Additional i need an email address validation application for validate address without be market the ip's and domain as spam thanks