user has identical worldnet.att.net email to our att.net email
Sometimes get email for a worldnet.att.net user with identical name address as my att.net email usually since a merchant left off "worldnet" so it went to me instead of the worldnet.att.net user so I unsubscribe. But can that worldnet user get my att.net email also? Does att's email system know these are two separate addresses two different users? And can I block worldnet user email address from my inbox without missing emails sent to att.net?