Hello,
I have gone through with your project details and can help you to setup an email marketing platform from where we can send cold email campaigns.
I will configure an email application like Interspire or Mailwizz in front end and PowerMTA in the back end for bulk mailing with all mailing authentications like SPF, DKIM, DMARC, RDNS, IP rotation etc.
I have more than 6 years of experience in bulk mailing, email marketing, SMTP'S Power MTA, Interspire, Sendgrid, Mailwizz, Active Campaign, Mautic, Mumara, Sendy, AWS SES and Oempro mailing application with secured server set up.
I would like to have a discussion with you to explain things in better way.
Thank You