Getting Full Headers from SpamCop Webmail (IMP Horde on the SpamCop Email System's webmail.spamcop.net server) is very easy, but it can't be done directly from the Message List (Mailbox View):
  1. Open a message by clicking on its Subject.
  2. Click the "Message Source" Link. This will open up a new window in your browser. Unfortunately, Ctrl-Click does not work with this Link in Firefox to open a new Tab.
  3. Close the window when you are done.
  4. Use the "Back to [mailbox/Folder Name]" Link to return to the Message List or use the left and right arrows to switch messages (if necessary).