To fix Roadrunner email login issues caused by stored browser data, you need to clear your cache and cookies. This removes outdated or corrupted files that interfere with login, and usually resolves sign-in errors quickly.
Step-by-Step: Clear Cache & Cookies
Click the three dots (top-right).
Go to Settings > Privacy & Security > Clear browsing data.
Select Cookies and other site data + Cached images and files.
Choose Time range: All time.
Click Clear data.
Click the menu button (three lines).
Select Settings > Privacy & Security.
Scroll to Cookies and Site Data → Click Clear Data.
Check both Cookies and Cached Web Content.
Hit Clear.
Click the three dots (top-right).
Go to Settings > Privacy, search, and services.
Under Clear browsing data, click Choose what to clear.
Select Cookies and cached files.
Click Clear now.
On Mac: Go to Safari > Preferences > Privacy → Click Manage Website Data → Remove all.
On iPhone: Go to Settings > Safari > Clear History and Website Data.