Transition to Yahoo and gmail use stopped

The concern is not "Community Center" help related............ Topic moved here to the proper help section for assistance. 

I use gmail as 3rd party app. Once I migrated I haven’t been able to get my mail. I’ve changed smtp server and port as yahoo provides and tried yahoo and comcast passwords. Not sure what the problem is

Are you saying you are trying to forward your @comcast.net email which has been transitioned to Yahoo! Mail to gmail.com?  If so, apparently you can't do that from Yahoo! Mail.  Or, are you using a third party email app like Outlook, Thunderbird, Apple/Mac Mail?  Here again you can't forward your email to gmail, but you can set up your email app to download your @comcast.net email.

Not trying to forward the email just to set it up to download to the GMAIL app