Procedure:

Step 01: In your control panel, click on Domains and then on the domain name in question. Step 02: Now click on “Edit DNS zone records”. Step 03: First, delete the default TXT record by clicking the Red X to the right on the respective row. Step 04: Add the following SPF record to your DNS zone. Step 05: Click Add record, pick TXT from the drop-down box, copy/paste the record into the Record Data field v=spf1 include:zcsend.net ~all