Unless I am wrong, it seems like exim is not sending the "correct" client ip to spamd when running with proxy-protocol. Except from this, proxy-protocol seems to work as should here.
-- Bj(/)rnar -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
