My website is on squarespace - called www.popseanart.com

I registered it originally through Godaddy which is where I needed to change the MX records (which I have).

It seems that I can send email from Zoho under my test address " mayumi@popseanart.com" but I can't send emails to this address without getting a mail delivery return.

What have I done wrong? The MX servers seem to work. The Squarespace page is also still working. I verified my account / domain.

Please help!

Thanks,

Sean