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Apple Email is suddenly disconnected from Comcast

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Apple Email is suddenly disconnected from Comcast

After years of problem-free use of Apple Email with Comcast, it suddenly disconnected.   I get a window asking me for my Comcast password and when I enter it I keep getting the message "cannot connect to 'smpt.comcast.net'.  

 

Why is Comcast rejecting my password?

Expert

Re: Apple Email is suddenly disconnected from Comcast

What version of Mac OS or OS X are you running?  Sierra or High Sierra, or something earlier?