DSL:MailSendingMessageHandler

Is there really some set of all JavaMail Properties to produce really useful Builder with specific methods?
Like:
```
public class JavaMailPropertiesBuilder {

     private final Properties properties = new Properties();  
      
     public JavaMailPropertiesBuilder debug(boolean debug) {
           this.properties.put("mail.debug", "" + debug);
           return this;
     }
     ....     
     public Properties get() {
           return this.properties;
     }

}