Comcast Email is not working on Iphone

As of yesterday, I’ve had issues getting my Comcast email on my iPhone. I’ve insured that the third-party setting is enabled. I’ve updated my password appropriately and I’ve even deleted the account and try to add but now that I’m trying to add, I keep getting the message that the service not responding or my username and/or password is incorrect, which I have validated is a fact correct; not sure if there are issues going on with the upcoming conversion to Yahoo Mail or this new security setting. However, as I said, I was able to get my emails no problem previously and As of yesterday, I have not been able to retrieve my emails and I’m only able to access it on the xfinity.com or my MacBook.  Can someone please help?!