/$LISTNAME/$MESSAGE_ID/raw -> raw mbox
/$LISTNAME/$MESSAGE_ID/f/ -> HTML content (full quotes)
-### Legacy endpoints (may be ambiguous given Message-IDs with similar suffies)
+### Legacy endpoints (may be ambiguous given Message-IDs with similar suffixes)
/$LISTNAME/m/$MESSAGE_ID/ -> 301 to /$LISTNAME/$MESSAGE_ID/
/$LISTNAME/m/$MESSAGE_ID.html -> 301 to /$LISTNAME/$MESSAGE_ID/
/$LISTNAME/m/$MESSAGE_ID.txt -> 301 to /$LISTNAME/$MESSAGE_ID/raw
Guidelines for using limited HTML
---------------------------------
+
We mainly use HTML for linking pages together with <a>.
We also set <title> to make window management easier.