Hey there,
After reviewing your project description its clear that you want an email sender that can send 40 thousand emails everyday.
I'm very experienced with System Administration, Network Administration, SMTP Server Configuration and Troubleshooting, PowerMTA Configuration, SMTP Authentication(SPF, Dkim, Dmarc), SMTP IP Rotation, SMTP IP/Domain Reputation, Email Marketing, Email Handling.
I'll be happy to help you with this.
Thanks in advance for giving the opportunity to working with you.
Have a good day.
Best Regards,
Sirajum Munir.