How do I test my email before sending it to contacts?

You can use the Test email option in Zoho Campaigns to see how your email will be delivered to your contacts before actually sending it to them.

To send a test email:

From the Navigation toolbar, click Campaigns, and then Email Campaigns.
From the campaign list view, click the campaign for which you want to send the test email.
Scroll down to the Content section and click Test Email.
Select the email address from the dropdown to which you want to send the test email.
Click Send Test Email.