Changed hosting provider DNS and MX records Unable to see Anything in the mailbox

Changed hosting provider DNS and MX records Unable to see Anything in the mailbox

Changed hosting provider DNS and MX records Unable to see Anything in the mailbox.  On the host side everything seems good 
http://mxtoolbox.com/SuperTool.aspx?action=mx%3arrokullia.com&run=toolpage#

Please advice on the steps.