Email account stopped working last week

You were given some bad information.  Comcast email can be enabled in any of the popular desktop email clients and mobile mail apps.  Which one are you trying to use?  Exactly what happens when you try to use the account through the client?

Apple mail or Spark…get same message. “The imap server “imap.comcast.net” doesn’t support Password authentication. Please check your account settings and try again.”  This occurs on the iPhone, iPad, and MacBook Pro. I have worked with imap and smtp settings for Comcast given by multiple sites including Xfinity site. One of my email accounts still works but two of them stopped working at night last week. 

Okay...I am now able to add 3 of 4 of my email accounts in Spark (assume Apple Mail will also work). However, my primary email with Comcast will still NOT allow the account to be set up in 3rd party email.  I have changed Comcast passwords and used the new ones to no avail.

Fixed. A knowledgeable Comcast agent helped. On the Comcast email page, settings, security there is a check box to allow 3rd party email client access. Why or how this got unchecked I don’t know.