'Too many API email invocations 11' error when sending emails via Apex

Sample code for SendEmail()

NOTE: The code provided below is an example. You should always test code before pushing to production.

//method to send mail to a list of users
public static void DispatchEmail() {
    List lstMails = new List();
      lst = 20;
       for(Integer i : lst) {
          Messaging.SingleEmailMessage message = getEmail();       
 //Construct the email message here by populating the values such as body, subject
                //Adding emails to the list       
 lstMails.add(message);
    }  
   //Sending the email list in a single call.
    Messaging.sendEmail(lstMails);
  }

 
public static Messaging.SingleEmailMessage getEmail() {
    Messaging.SingleEmailMessage mailMessage = new Messaging.SingleEmailMessage();
    mailMessage.setSaveAsActivity(false);
    return mailMessage;
  }