Zoho Mail Admin Console Configure Email Delivery One and One DNS - MX Records
If your DNS is hosted with 1 and 1 follow the below steps to change the MX Records of the domain to start receiving emails.

You have now added the MX Records for your domain successfully. The MX records will be effective as per the TTL time of the domain. You can check the MX records of the domain using the third party tool www.mxtoolbox.com .