Shopify and Zoho verify domain

Shopify and Zoho verify domain

Hello!

I've been three weeks triying tu set up everything with my Zoho email but seems near impossible to me right now.
All the emails send to my Zoho email are coming back to the sender, so I'm unable to receive any email on my Zoho accounts.

I bought my domain on Shopify and everything seems to be fine but my account is not working. My domain is www.yumi-wear.com

Thanks