Step 1- Create an Organization
Sign up into www.business.zoho.com and click on the Create Organization link given on the top panel. Once you have created an organization you can add and validate your domains.

Step 2- Add Domain (Learn more about adding domains! )

1. Click on the Control Panel on the top right and select Domains.
2. Click on Add Domain

Accessing Control Panel to Add domain

Step 3- Verify Domain
Verify your added domain by clicking on the Verify link. Domain validation is imperative for the following functions:

1. To add/import users to your organization
2. To receive domain based emails

Step 4- Add Users
Add or import members to your organization.

1. Click on Control Panel->Users
2. Click on Add User

Step 5- Set up Mail Account
Provide your userid@yourdomain.com and add the mail alias. Click here to know more about how to create mail accounts for your organization members.

Step 6- MX Modification
Once your mail account has been set up you can now point your MX records to Zoho Business IP send and receive domain based emails. 

Enter the following MX records after having deleted the existing entries. Please note the order of MX priorities. Click here to learn more about MX Records.

MX Record	Priority
mx.zohomail.com	10
mx2.zohomail.com	20

Step 7- Enable Mail Hosting
After you have verified your domain you can enable your domain for mail hosting.

1. Click on the Control Panel and select Mail Administration.
2. Click on Enable