Outlook 2007 / Windows 7 / Your server does not support the connection encryption type error

Folks,

Well, my Comcast incoming email just stopped working, either overnight or over the past few hours.  I'm using Outlook 2007 on Windows 7, and I certainly haven't changed any settings.  "In years."  I'm using POP3 (and would really really like to continue doing so), and I'm getting mail just fine on my Android phone.  Here is the error message I've been getting:

Task '********@comcast.net - Receiving' reported error (0x800CCC1A) : 'Your server does not support the connection encryption type you have specified. Try changing the encryption method. Contact your mail server administrator or Internet service provider (ISP) for additional assistance.'

Yes, yes, of course I have rebooted and so on.  I've tried changing from TLS to SSL, and that didn't help.  So, does anyone have any thoughts here?  Has Comcast made some kind of secret, unannounced requirement that we all have to change to IMAP or something?  Thanks in advance for any thoughts you could send my way.