Not receiving emails sent from xxx@YAHOO.com to my xxx@ZOHO. All others working OK.

Not receiving emails sent from xxx@YAHOO.com to my xxx@ZOHO. All others working OK.

I am NOT receiving emails sent to me ( xxx@Zoho.com) from any xxx@YAHOO.com senders. This is ONLY happening for emails coming from xxx @YAHOO.
I am receiving All other (Non-Yahoo) emails properly.
Are emails sent from xxx@YAHOO.com being BLOCKED for some reason??
This is a bad problem - please HELP as soon as possible.