How to log issue in SFDC by sending email?

SingleEmailMessage.java

ID userid = UserInfo.getUserId(); 
User currentUser = [SELECT Id, Email FROM User WHERE Id =:userid]; 
 
 
List <String> ToAddresses = new List <String>();   
ToAddresses.add('[email protected]'); 
String subject = 'Issue Log Notification Email'; 
 
 
String body = 'Test'  + '\n'; 
 
 
Messaging.SingleEmailMessage email = new Messaging.SingleEmailMessage();  
email.setTargetObjectId(currentUser.id ); 
email.setToAddresses( ToAddresses ); 
 
 
email.setSaveAsActivity(false);  
email.setBccSender(false); 
email.setUseSignature(false); 
 
 
 email.setSubject( subject ); 
email.setHtmlBody(body);//email.setPlainTextBody( body ); 
 
 
Messaging.SendEmailResult [] r = Messaging.sendEmail(new Messaging.SingleEmailMessage[] {email});