Configure dedicated server for bulk email

I require server configuration for bulk mailing. We installed web based mailing system, we want to use our own SMTP server, but some of the mails for gmail, hotmail, and aol etc. goes to spam box, I am looking for some one who will do necessary work on our dedicated server to increase inbox delivery rate. We have dedicated IP addresses, we have our own domain reseller system we can get multi domains hosted on same server etc. ([login to view URL]) CentOS with Plesk is installed on the server. - we will send large volume emails per day - DKIM Signing, RDNS, PX, MX Records & SPF records + Run lookups to confirm rDNS. - Should be able increase the Inbox delivery rate and pass spam settings. Please place your bid. Thanks