Bulk Email EXPERT needed to optimize email server

We host our own bulk email server and need a bulk email expert to optimize the server for maximum delivery and reduce the detection of SPAM. We have a high overload on the servers and need to solve it, we send 180.000 e-mails per day. Currently, the simplest text email sent from this system is marked as junk mail in MS Outlook. 99% of our recipients use Outlook and Exchange server to receive email. We also use [login to view URL] for email marketing and do not have this issue. The right candidate will be able to analyze the difference in the emails, headers, etc, to optimize our server for similar results. Our current setup is cPanel and Exim. Candidate should be able to optimize Exim or recommend another email daemon that they can optimize, ie Postfix, or other. We also need recommendations to keep email deliverability at a maximum, including bulk email best practices. We DO NOT SEND SPAM. We are a legitimate Marketing company sending 100% CAN-SPAM compliant email. This need is IMMEDIATE. Hosting: Dedicated virtual server running WHM / cPanel and Exim This is a brand new server; no mass email has been sent from it yet. We've only sent ourselves test emails. Our IP is not on any blacklists as reported by mxtoolbox.com. RDNS (PTR record) is set up. We are looking for an expert that can solve these problems.