Fix our bulk email server

We have the following requirement. We need you to optimise our bulk email server. Following is what we have 1. We have a dedicated server on which the root domain has the Interspire installed, version screenshot attached 2. We have 2 ecommerce stores on their respective Ip addresses. We don’t want to use that for email marketing, (Ip address and domain) 3. We have in total 34 IP addresses (Including 4 for some of our sites and the above mentioned stores 4. We have PORT25 Installed 5. We have a list of 80000 users to whom we need to send marketing mails What we want 1. We want inbox deliveries 2. We don’t know if spf records are rightly setup 3. We see mails landing in spam of every mailbox