Can't get or send emails from cox.net using Thunderbird

Have been using my cox.net email with Thunderbird for years on a Windows 10 PC, also with 2 ipads, Win 10 laptop and 2 iphones.  Cannot get or send emails from my cox.net on any device.  Desktop Error message:  (uses pop.cox.net) "Enter your password.  Sending of password for use did not succeed.  Mail server responded Authentication Failed."  

Ipad or Iphone error message (uses imap.cox.net):  "Account Error, No password provided for Cox.  please go to Mail Account settings and enter a password."

I have triple checked my passwords, all are accurate.  I CAN get and send emails from the cox.net website, but on NONE of my devices.

Any ideas?  Thunderbird and all devices are up to date.

Whenever this happened in the past, it would mysteriously clear up in a day.  Not this time!!! I have searched the internet.  HELP!

Thanks for your help!

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