[exim] smtp_accept_max_per_host

i am being smtp flooded from numerous sources.

i have

    smtp_accept_max_per_host = 4

yet

    netstat -nf inet \
    |  awk '$4 ~ /\.25$/ {split($5, a, "[.]"); print a[1]"."a[2]"."a[3]"."a[4]}' \
    | sort | uniq -c | sort -nr | awk '$1 > 1' | head -4

shows

19 78.3.64.138
14 125.25.31.62
10 58.186.134.147
10 123.19.248.195

so clearly i am not understanding something. clue bat, please.

randy