New Post: How to create a new message in any folder?

I am using the example below, but the message is not being created. What am I doing wrong?

Message m = new Message();
MailAddress adr = new MailAddress("Hudson", "hudson@amzsolucoes.com.br"); MessageContent mc = new MessageContent();
mc.TextData = "Message Test from visual studio";
m.To.Add(adr);
m.Subject = "test from visual studio";
m.TextBody = mc;

CreateMessageFolder(m, folder);

public void CreateMessageFolder(Message _NewMsg, Folder _folder)

    {
               _folder.AppendMessage(_NewMsg, ImapFlags.DRAFT);                        
    }