MXLogic Mail Admins

Hello, Is any MXLogic Mail admins subscribed to this list, or anyone who has a contact inside MXLogic that can contact me off list? Multiple outbound gateways have been having problems with the MXLogic inbound servers over the past few days and the tier1 support continues to say that our IP's are not on their blacklists and that there shouldn't be anything wrong. Thanks for the help! -Ray