Hi,
I have created one class to send the email to a particular customer When I call that class the send email method gives me success is true but email is not sending to the customer. Please check my code.

Please help me with this.

public class WorksContractEmailController{

public String strMessage{get;set;}

Public WorksContractEmailController(){
    try{
    String oppId = ApexPages.currentPage().getParameters().get('id'); 
    Opportunity oppObj = [Select Id,Account.PersonContactId,Works_Contract_Sign_Off_Date__c,Customer_Email__c From Opportunity Where Id = :oppId LIMIT 1];
    SendWorksContact(oppObj);
    }catch(Exception exp){
      strMessage = exp.getMessage();
    }
}


public PageReference SendWorksContact(Opportunity objOpp){
    try{
        if(objOpp.Works_Contract_Sign_Off_Date__c != null){
            Messaging.SingleEmailMessage email = new Messaging.SingleEmailMessage();
            EmailTemplate templateId = [Select Id from EmailTemplate where name = 'Works_Contract_Attached' Limit 1];
            email.setTemplateID(templateId.Id);
            PageReference pdf = Page.WorksContractVFPage;
            pdf.getParameters().put('id',objOpp.id);
            pdf.setRedirect(true);
            Blob b = pdf.getContent();
            Messaging.EmailFileAttachment efa = new Messaging.EmailFileAttachment();
            efa.setFileName('WorksContarct.pdf');
            efa.setBody(b);
            email.setFileAttachments(new Messaging.EmailFileAttachment[] {efa});
            email.setToAddresses(new String[] {objOpp.Customer_Email__c});
            email.setTargetObjectId(objOpp.Account.PersonContactId);
            email.setSaveAsActivity(false);
            email.setWhatId(objOpp.Id);
            system.debug('------email----'+email);
            system.debug('------objOpp.Account.PersonContactId----'+objOpp.Account.PersonContactId);
            Messaging.SendEmailResult [] objResult = Messaging.sendEmail(new Messaging.SingleEmailMessage[] {email},false);
            if(objResult[0].isSuccess())
              strMessage = 'Email has been send.';
            else
             strMessage = 'Error - '+objResult[0].errors[0].message+' to send to the works contract,Please contact to your system administrator.';  
            system.debug('-----(objResult[0].isSuccess()----'+objResult[0].isSuccess());  
        }else{
            strMessage = 'Please update Works Contract sign off date.';
        }
    }catch(Exception exp){
      strMessage = exp.getMessage();
    }

 return null;

}

Thanks,