I have had a Road Runner email account for years. A few months ago when the format changed, I could only view one page of my emails; unable to go to page 2, 3, 4.... after several calls to Road Runner support, I can get to other pages but it takes 2-3 minutes to load. This also occurs when I initially log onto my email. This only occurs when checking my email from my laptop computer; not from my iPad. I have been informed by tech support this is something they are working on but it has been going on for 2 months. They even sent a service tech to my home who didn’t know anything about email.
There seems to be a formatting problem with some legacy Roadrunner accounts on Windows machines. Look in your email application menus for an option to NOT load photos or graphics in each email message. Apple's e-mail software can handle RR mixed text and photos much faster.