Hello,
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 5 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 make things clear.
Thank You