We have Roadrunner Service in the Orlando area for our business and have had a consistent issue with the ability to send e-mails to cfl.rr.com addresses. When I look at them in our Exchange Queues they are getting hung up and unable to be delivered. I have verified our IP using MXtoolbox lookup and we are not on any blacklists. I tried support but they were not able to be much help. As this is the only domain we have issues with I'm thinking they may have us on a blacklist they verify against.
