Can send e-mail, not receiving . . . MXToolBox is saying "Reverse DNS does not match SMTP Banner"

Can send e-mail, not receiving . . . MXToolBox is saying "Reverse DNS does not match SMTP Banner"

Hello,

I thought I posted this already but I don't see it anywhere.   I recently configured Zoho to be my e-mail client.  But it appears I can only send e-mails, not receive them.  I have sent several test e-mails and they all arrived to the correct addresses.  But nothing is coming to my Inbox.   

I followed the instructions to configure the domain in GoDaddy and then did the check in MXToolBox.  I came back with no errors but one warning: "Reverse DNS does not match SMTP Banner".   

Is this the problem and if it is, how do I fix it?

Thank you,

Jack