email issue

I have a roadrunner email account with Spectrum (formerly Time Warner).  I use Windows Live Mail.  The last few months, I've had a problem accessing my emails on Windows Live Mail....it doesn't accept my password.  It's very frustrating because it might take ten or more minutes to access...eventually, my emails will show up in the inbox.  The interesting thing is that I can send emails.  Just having difficulty receiving them.  Any suggestions?