ONCE AGAIN... Outlook keeps prompting to "Enter Network Password" when all passwords are in order

Same here - we are getting so annoyed witht he popup (Internet Email - enter your user name and pasword for the following server [pop.cox.net]) ALL THE TIME.  It goes away for a period of time and then returns.  I'm looking at the blasted popup right now- just checked OK.  All my settings are fine.  I use Outlook 2010.  Husband uses Outlook 2013.  Happens to both of us.  Recently its been popping up every 5-10 min (or more frequently). Cox support (Tier 1 and 2) are no help - claim its not their problem its Microsoft - unacceptable response!  Have tried working with them several times and each time we go through all my settings, change passwords etc etc and nothing gets resolved. Been searching through various forums dating back years and seems that this issue has been around for some time.  Why can't Cox fix it??  (and just got another blasted popup)

Please provide a definative solution!!!

But this IS a Cox problem. First of all, it comes and goes. Second, it happens on all devices, even the ones without Outlook. Third, it happens on all sorts of different versions of Outlook, and OS. Fourth, I have other accounts set up in the very same Outlook AND on the very same devices (gmail, and another account that operates on a foreign server, of all things), and THE OTHER ACCOUNTS WORK FLAWLESSLY. But this issue affecting the Cox accounts exclusively periodically rears its ugly head and persists until I complain via this forum and then you do whatever it is you do on your side to fix it. (Phone support has been of no help, unfortunately.)

It's obviously not just me with this issue. It seems rather prevalent and wide-spread, and we would not be complaining here if this wasn't circumscribed to our Cox accounts. There must be a fix for this.

Please check the records of what was done for my past complaints, because whatever it was, it worked, at least for a long while.

Thank you.

POP3 Authentication Errors.
Having same issue with periodically ongoing server authentication errors.  Cox's email Servers are not passing credentials about 50% of the time.  Problem is on all devices and platforms.

Yes, my server settings are correct.

Agree completely with ILC!!  This is a COX issue that comes and goes. Still getting the popup every few minutes.  Once I click OK (without making any changes to any setting) my email sends/receives for a few minutes until the popup comes back.  Its as if the COX server is not recognizing the password until its reminded what it is.  Then it forgets again.  Server seems unable to reconcile password to the account.

Seriously with that response? This is a Cox issue that's been happening for years...and we get the same canned answers that we've all read for years across hundreds of posts from customers regarding this issue.

I go through this issue a couple times a year, every year, like clockwork. We all do. This is not a settings or password issue, or else it'd be happening 24/7. Most of us are all following your own support page on what settings our email programs are supposed to have. 

Furthermore, Cox Webmail isn't even working. I've been trying to go to the login page on the Cox site for hours...and keep getting an error page. See attached screenshot of the error message.

I am having the same problem with Outlook.  It seems to have started for me when Cox made the email switch to new server port numbers and SSL encryption.  Definitely a Cox problem that needs to get resolved.