Incoming email is down, imap.w14d.comcast.net not responding for some time now

Several hours no IMAP (incoming) mail.

I work in IT and I can plainly see that 

imap.w14d.comcast.net

is not responding.  

RED exclamation point on email icon if try to access business class account via browser.

Hoping and assuming this is resolved soon, it has been one trouble or another at various times all day today, Monday Sept. 14, 2015.

Have tried all sorts of things like

$ telnet imap.w14d.comcast.net 993        

Trying 162.150.57.78...

......