Keeping it short It depends on what you are using client wise and system wise but the simple thing to do is look at the archives to see which of your emails did come in and think about anything you may have done differently  changed your client etc It looked to me as if you were using a new client but essentially whats appears is happening is that the message itself is being wrapped as an attachment as its being sent out The mail server automatically drops all attachments for a number of reasons so all thats shown is the container People on the list may get the full message but the archive wont Hope that helps