Salesforce email Unsubscribe.....

Hi Every one,
Following code. How to unsubscribe emails in Salesforce.

Global class unsubscribe implements Messaging.inboundEmailHandler{

Global Messaging.InboundEmailResult handleInboundEmail(Messaging.InboundEmail email,
                            Messaging.InboundEnvelope env ) {

// Create an inboundEmailResult object for returning
//the result of the Apex Email Service
Messaging.InboundEmailResult result = new Messaging.InboundEmailResult();

// Contact and Lead lists to hold all the updated records
List<Contact> lc = new List <contact>();
List<Lead> ll = new List <lead>();

// Convert the subject line to lower case, so I can match on lower case
String mySubject = email.subject.toLowerCase();
// String I am searching for in the subject line
String s = 'unsubscribe';

// Check variable to see if the word "unsubscribe" was found in the subject line
Boolean unsubMe;
// Look for the unsubcribe word in the subject line,
// if it is found return true, otherwise false is returned
unsubMe = mySubject.contains(s);

 // If unsubscribe is found in the subject line enter the if statement

 if (unsubMe == true) {
   
    try {
       
    // Lookup all contacts with a matching email address
       
     for (Contact c : [Select Id, Name, Email, HasOptedOutOfEmail
                        From Contact
                        Where Email = :env.fromAddress
                        And hasOptedOutOfEmail = false
                        Limit 100]) {
                       
        // Add all the contacts into the List  
                            c.hasOptedOutOfEmail = true;
                            lc.add(c);                                
    }  
        // update all the Contact records
       
        update lc;
            }
    catch (System.QueryException e) {
        System.debug('Contact Query Issue: ' + e);
        }  

    try {
        // Lookup all leads matching the email address
     for (Lead l : [Select Id, Name, Email, HasOptedOutOfEmail
                        From Lead
                        Where Email = :env.fromAddress
                        And isConverted = false
                        And hasOptedOutOfEmail = false
                        Limit 100]) {
        // Add all the leads to the List      
        l.hasOptedOutOfEmail = true;
        ll.add(l);
                             
           System.debug('Lead Object: ' + l);  
    }  
        // Update all Lead records in the query
        update ll;
            }

    catch (System.QueryException e) {
        System.debug('Lead Query Issue: ' + e);
        }  

    System.debug('Found the unsubscribe word in the subject line.');
 }
 else {
    System.debug('No Unsuscribe word found in the subject line.' );
 }
// Return true and exit
// True will confirm it is complete and no bounced email
// should be send the sender of the unsubscribe request.
result.success = true;
return result;
    }  
   
    // Test method to ensure you have enough code coverage
    // Have created two methods, one that does the testing
    // with a valid "unsubcribe" in the subject line
    // and one the does not contain "unsubscribe" in the
    // subject line
   
static testMethod void testUnsubscribe() {

// Create a new email and envelope object
   Messaging.InboundEmail email = new Messaging.InboundEmail() ;
   Messaging.InboundEnvelope env    = new Messaging.InboundEnvelope();

// Create a new test Lead and insert it in the Test Method      
   Lead l = new lead(firstName='Rasmus',
            lastName='Mencke',
            Company='Salesforce',
            Email='rmencke@salesforce.com',
            HasOptedOutOfEmail=false);
   insert l;

// Create a new test Contact and insert it in the Test Method
   Contact c = new Contact(firstName='Rasmus',
                lastName='Mencke',
                Email='rmencke@salesforce.com',
                HasOptedOutOfEmail=false);
   insert c;
 
   // test with subject that matches the unsubscribe statement
   email.subject = 'test unsubscribe test';
   env.fromAddress = 'rmencke@salesforce.com';
 
   // call the class and test it with the data in the testMethod
   unsubscribe unsubscribeObj = new unsubscribe();
   unsubscribeObj.handleInboundEmail(email, env );
                       
   }

static testMethod void testUnsubscribe2() {

// Create a new email and envelope object
   Messaging.InboundEmail email = new Messaging.InboundEmail();
   Messaging.InboundEnvelope env = new Messaging.InboundEnvelope();

// Create a new test Lead and insert it in the Test Method      
   Lead l = new lead(firstName='Rasmus',
            lastName='Mencke',
            Company='Salesforce',
            Email='rmencke@salesforce.com',
            HasOptedOutOfEmail=false);
   insert l;

// Create a new test Contact and insert it in the Test Method  
   Contact c = new Contact(firstName='Rasmus',
                lastName='Mencke',
                Email='rmencke@salesforce.com',
                HasOptedOutOfEmail=false);
   insert c;
 
   // Test with a subject that does Not contain unsubscribe
   email.subject = 'test';
   env.fromAddress = 'rmencke@salesforce.com';

   // call the class and test it with the data in the testMethod
   unsubscribe unsubscribeObj = new unsubscribe();
   unsubscribeObj.handleInboundEmail(email, env );                    
   }  
 
}
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After write a code then we will following steps.

Step1:- Click setup->Customize->Develop->click Email services->
Step2:- Click New Email Services create new email services.
Step3:- Copy unsubscribe class then click Active check box.
Step3:- Finally we are creating email services link then we will use the this link Email Templates.