For a few reasons, Set-up Roadrunner Email Correctly on iPhone is stopped and after updating to iOS5 does not work properly.
So you can go through the following steps from roadrunnersupport247.com to resolve the error you have encountered. Roadrunner Email Settings: To send the Road Runner Web Mail from iPhone & iPad
Here are Steps How to Set Roadrunner Email Correctly on iPhone?
Select Settings on the iPhone or iPad.
Select “Mail, Contacts, Calendars.
Select Add Account.
Add mail account and fill in details:
Description: Road Runner Mail
How do I get Roadrunner Email