+
+### Stable endpoints
+/$LISTNAME/m/$MESSAGE_ID.html -> HTML content (short quotes)
+/$LISTNAME/m/$MESSAGE_ID.txt -> raw original
+/$LISTNAME/m/$MESSAGE_ID -> 301 to .html version
+/$LISTNAME/f/$MESSAGE_ID.html -> HTML content (full quotes)
+/$LISTNAME/f/$MESSAGE_ID -> 301 to .html version
+/$LISTNAME/f/$MESSAGE_ID.txt -> 301 to m/$MESSAGE_ID.txt
+
+TODO (these might be expensive)
+-------------------------------
+/$LISTNAME/t/$MESSAGE_ID.html -> HTML content of thread
+/$LISTNAME/t/$MESSAGE_ID.mbox -> mbox content of thread