I had this problem and resolved it successfully by removing the blank spaces at the end of some lines. The blanks do not appear on every line and range from 1-3 spaces where they do appear. My question: how will this impact the operation of the service? I am fairly diligent about reporting spams, even though it seems futile in many cases (for example, chinanet). If I will need to edit every header to remove blank spaces, the reporting, however valuable, becomes too much work.