In your survey application, click on the Profile.
Click Manage Portal.
Select Sender Email Authentication on the left pane.
Click Add.
Enter the required email addresses in the Email Address textbox.
Click Save to receive verification emails in the email address you have provided.
To verify your email addresses, log in to your email client and open the verification email sent by Zoho Survey.
Click the Accept button in the email to complete the verification process.
Once verified, you will find your sender address listed under the Sender Email Authentication tab and the domain listed under the Domain Authentication tab.

Note:
Hover over the sender you want to edit in your portal and click .
Click Activate.
Click Confirm in the dialogue box that follows.
Hover over the sender you want to edit in your portal and click .
Click Delete.
Click Confirm in the dialogue box that follows.