556080 Linux Cpanel Server Admin Consultant - Spam & IP Reputation

A quick & simple job. I have 7 Cpanel servers (shared IP hosting). All of them do not have any issues with IP reputation or blacklisting at spamhaus/spamcop/senderbase but time to time I do have issues sending emails to yahoo & hotmail, as well as those server with barracuda firewall. I am looking for someone with the experience and expertise to ensure all servers meet the requirement so that e-mails sent to yahoo/hotmail/gmail do not goes into spambox/deferred or bounced back. For eg. Hotmail require user to set senderid, rDNS, etc etc.. which I have already have the settings on. I need you to check & test all those & make it work. Pls quote for whole job. TQ