Hi,
I will check and fix mail delivery issue for all domains and update all records that is spf,dkim,dmarc for good inbox. I have 13 Years of experience in bulk mailing, email marketing.I will configure Postfix, Power MTA ,Interspire, Zimbra, Mauctic and Mailwizz,Sendy,Mumara, SES, Sendgrid, Mailgun mailing application with secured server set up.
Thank you