Outlook won't receive Yahoo Mail

I have Norton Security Suite 22.5.2.15 from Norton and Comcast xfinity. I can no longer receive any email from a yahoo.com domain to my Outlook 2010.

The same was happening for hotmail too, but I turned off AntiSpam and hotmail started working again, even when I re-enabled Antispam. Weird.

No such luck with yahoo email though. I never get a bounceback to my yahoo account so it is getting sent.

Is there some specific setting in the firewall I need to make or something to get mail from yahoo?

Thanks.