This API call has been deprecated. User should use IsEmailOnList.
Determine whether a contact has unsubscribed from a list by checking their email address.
XML Request Example:
<?xml version="1.0" encoding="UTF-8"?>
<xmlrequest>
   <username>JohnDoe</username>
   <usertoken>abc123abc123abc123abc123</usertoken>
   <requesttype>Lists</requesttype>
   <requestmethod>IsUnsubscriber</requestmethod>
   <details>
      <email>john.doe@pinpointe.com</email>  <!-- required -->
      <list>4</list>  <!-- required -->
   </details>
</xmlrequest><xmlrequest> element
| Field Name | Description | 
| username | Username used to login to Pinpointe | 
| usertoken | Unique token assigned to Pinpointe account | 
| requesttype | Lists | 
| requestmethod | IsUnsubscriber | 
<details> element
| Field Name | Description | 
| email (Required)  | email address of contact list to be searched for | 
| list (Required)  | list id of list to be searched | 
Successful Response:
<response> element
| Field Name | Description | 
| status | Will return SUCCESS if user is unsubscribed | 
| data | Will return 1 if contact unsubscribed | 
Unsuccessful Response:
<response> element
| Field Name | Description | 
| status | Will return FAILED if call is unsuccessful. Will also return FAILED if contact is found on list BUT is not unsubscribed.  | 
| errormessage | Text explaining why request failed saying contact is |