Linux server expert to fix DNS, MX and Glue Mismatch problems.

We recently rolled to a new CENT-OS dedicated server. Since that time several of the domains have experienced blocked emails (554 Denied [CS] and 550 Error - Blocked for abuse.). When checking our server's domain, [login to view URL], on [login to view URL] I see a Glue Mismatch error. Lastly, my server guy is saying all this is caused by our permitting some of the hosted domains to forward email to AOL or GMail accounts. This, he says, is causing the DKIM validation to fail, thus causing rejections, and once or twice causing those domains to land on a blacklist. He says we cannot forward anymore and he doesn't know how to fix the Glue Mismatch error. I am seeking a Linux expert who can help me resolve these issues. I'll pay BY THE HOUR to get this work done. You must be proficient in DNS, MX records, and DKIM validation. Because I'd like to be in contact with you by phone at various points in this project, it's vital that you have excellent phone communication (most country's Skype is not 'excellent') and you speak English. USA workers are preferred for this reason. Resolution of these problems could lead to long-term work. 1) How many years of Linux experience do you have? 2) Please tell me your rate PER HOUR. 3) Where do live (city + country)? 4) Do you use only Skype? Or do you have a cell or landline? 5) Relative to Pacific Time Zone, what hours are you typically available? Thanks very much for responding.