1) Buy a domain from namecheap, crazydomains, godaddy etc.
2) Sign up to zoho business email
3) Once sign up is completed, you can add multiple “managed” domains under your primary owned account
4) Click on your profile photo on the top right and click on on Admin Console
5) Click on the “Domains” tab in the left panel, direct link here
6) Click on the Add dropdown and type in your newly purchased (or existing) domain address
7) You’ll need to verify ownership of this domain.
Paste the data in the appropriate fields in your domain registration service (namecheap etc)
9) Wait 15-30 minutes
10) Then you you’ll need to add MX records to your DNS. In your DNS in the Mail Settings section, select “Custom MX” from the dropdown and add in the values zoho provides (similar to below)
11) This should do the trick and you’re good to go.
12) For boosting deliverability, you can continue to add the SPF and DKIM records.
13) These are both TXT fields, and you simply just copy the values given in zoho into the DNS
14) Wait 30 min - 2 hours for this to verify, but you can start sending emails if you’d like to.