# background: something like this does not work for packets which
# exim is replying to. I don't know why.
#iptables -t mangle -A OUTPUT -m owner --uid-owner Debian-exim -j MARK --set-mark 0x1
# background: something like this does not work for packets which
# exim is replying to. I don't know why.
#iptables -t mangle -A OUTPUT -m owner --uid-owner Debian-exim -j MARK --set-mark 0x1