I see it in some threats in the first and last reply.
Like this is an automatic reply with amazon search.
https://www.powerforen.de/thema/strom-und-internet-in-oesterreich.249983/
Is it possible to let the ninx cache the avatars and the preview pics?
data/avatars/m/0/2.jpg?1292016731
or attachments/editor-jpg.1514/
cannot be cached by the nginx.