on my own email account when the email server is down. My email software doesn't know it is down so when the login/password request is rejected, the software assumes it is a problem with my login details.
You said that you can get email on your smart phone but that is likely a different email server.
Is ATT&T's email server down? Can you access your emails via your AT&T web account? That often works when the server is down.
Getting error msg when I check email for just one acct. This started happening occasionally and now it's all the time. username / password ARE correct. No problem signing in directly to att.net mail acct or getting email on iphone --but not thru Windows Live Mail. Msg is:
Unable to send or receive messages for the xxxxx account. An incorrect password was entered. The next time you send or receive messages, you'll be asked to enter your user name and password for this account.
Server Error: 0x800CCC90
Server Response: -ERR [AUTH] invalid user/password
Windows Live Mail Error ID: 0x800CCC92