Incoming mail not working

Hi there

I just signed up with Zoho and attempted to move our e-mail accounts across. I have set up two accounts so far and both are able to successfully send mail, but neither are receiving. I changed a few settings and at one point both briefly started receiving mail, but shortly thereafter they stopped again.

I'm sure there is something simple I am missing. Is it possible for you to check my settings and advise me if there is anything I need to change? The domain is stonelogic.co.za

Thank you
W. Williams