Email Campaigns

Hi there.

I am trying to set up an email campaign. I am doing test emails at the moment and I am getting 2 emails sent to an account every time I do a test email. One email is the template I designed and the other is an plain text email of the template I designed.

Obviously I want to sort out this issue ASAP and am a bit inexperienced with ZOHO so I need some help!
Is there any way to get rid of the plain text email. I only want to send the template I designed to clients when I get the email campaign up and running.

Any help would be much apprecciated!