Will comcast force us to transition to yahoo email?

I transitioned one of my family's comcast email accounts to yahoo and , after much needless pain , got it to work. 

Sort of.

Between ads, what appears to be messages in a text box on the yahoo webmail page from a reputed phishing site , and MOST IMPORTANTLY an aggressive spam filter that CANNOT BE SHUT OFF  , the experience is not particulrly joyful.  

If you use outlook to manage your email, be aware that the first thing yahoo does is decide whether an incoming message is spam. 

If it thinks it is spam, no filter gets executed and into the spam folder it goes. 

Once there, it is inaccessible to outlook.

You have to go to the yahoo web page and  manually move the supposed spam. 

This supposedly "trains" the spam engine. 

So now, on that account I have a new manual task that I have to remember to execute.

Some research shows that this is not a new issue for yahoo, it is at least a few years old and clearly they aint gonna fix it. 

Great.

To say I'm annoyed is a bit of an understatement. 

If I had it to do over again, I would not do it.

So I wonder whether I'll be forced with the rest of the family accounts?