I have been using Windows Live Mail for years.  All of a sudden, some months back, it stopped being able to receive emails from Comcast email servers.  It sent emails without a problem.  And my two other Live Mail accounts continue to work flawlessly.  But I can't receive from the Comcast server.  Actually, every 5-10 days, it somehow decides to download all those messages. 

I purchased a new laptop, going from Windows 7 to Windows 10.  Same problem.  I've been on for hours with Comcast support and Lenovo support.  No luck.  Comcast escalated it, but I'm told it's a problem with Microsoft's software.  It seems that it's a problem with the interface between Windows Live Mail and the Comcast server.  I'm on Live Mail 2012.