If you are using roadrunner email, you can add your roadrunner email to outlook. And after setting up your email you are able to check your all emails at one place without login to your roadrunner account and if you are using more than one email address so you can also add them all and you can easily check your all email. If you want to roadrunner email settings on your iPhone then here are some steps to do it.
Steps:
Open outlook, And click on file icon
Then click on add account option
A new window open, enter the roadrunner email address and expand the advance option
Then choose “let me setup my account manually”
Click on Connect button button
Now you need to enter the Above listed settings and then click on the next button
Finish this process by click on the next button
For more information:
https://theomnibuzz.com/how-do-i-set-my-roadrunner-email-on-outlook/
http://toparticlesubmissionsites.com/how-do-i-set-up-my-roadrunner-email-in-outlook/