sub email no longer working

3 of the 5 sub email accounts I have under my main comcast email started having issues today. Inbox contents are not displayed. I get a "The provided login data to access mail server imap.comcast.net seem to be wrong. Please correct them."      I have gone into settings and email acoounts and rentered passwords for Incoming Server, but this doesn't resolve the issue.

My main comcast email is working fine.   I have not had Comcast/Xfinity as my ISP since moving to a new state 4 years ago where it was not available. But, I was told my email accounts would live on.

I am on hold with Comcast support right now awaiting a security specialist and estimated wait  time is "more than 40 minutes.  Uggg! First line support tried to walk me through some password reset steps, but they can't be completed unless I am connected to Xfinity WiFi.   Hence, the transfer to a security specialist.   He said the 3 sub emails and been deactivated, but could not explain why those 3 had been deactivated, but not the other 2.