Hi, I need an SMTP Server setup with SPF/DKIM/RDNS/ AND IP ROTATION . i want do mass mailing (20.000 emails per day). I need that my mails go to INBOX. For this, I need setup my VPS with Postfix + DKIM + IP Rotation + SPF + rDNS and other stuff that will be fine for my purposes on my VPS . I have interspire on my VPS. Please tell me how many IPs i need and if we can use PowerMTA also. Please do not apply if you don't have experience in bulk email marketing that goes to INBOXES (not spam folder). Thanks.