Last attempts:

Apr 18 10:32:56 chaosophia spamd[65751]: 151.54.29.82: connected (1/0)
Apr 18 10:33:09 chaosophia spamd[65751]: (GREY) 151.54.29.82: <simmonsj71@buxrud.se> -> <gegjsd@koue.net>
Apr 18 10:33:09 chaosophia spamd[65751]: (GREY) 151.54.29.82: <simmonsj71@buxrud.se> -> <sawjks@koue.net>
Apr 18 10:33:09 chaosophia spamd[65751]: 151.54.29.82: disconnected after 13 seconds.
Apr 18 10:40:10 chaosophia spamd[65751]: 151.54.29.82: connected (1/0)
Apr 18 10:40:21 chaosophia spamd[65751]: (GREY) 151.54.29.82: <harebrainedf4@bmatter.com> -> <gegjsd@koue.net>
Apr 18 10:40:21 chaosophia spamd[65751]: (GREY) 151.54.29.82: <harebrainedf4@bmatter.com> -> <sawjks@koue.net>
Apr 18 10:40:22 chaosophia spamd[65751]: (GREY) 151.54.29.82: <harebrainedf4@bmatter.com> -> <neikgj@koue.net>
Apr 18 10:40:22 chaosophia spamd[65751]: (GREY) 151.54.29.82: <harebrainedf4@bmatter.com> -> <ywljzd@koue.net>
Apr 18 10:40:22 chaosophia spamd[65751]: 151.54.29.82: disconnected after 12 seconds.

After 3 days and 10 hours the result is 458 entries in the spamd table.

And the winners are:

...
Apr 16 04:18:54 j102 spamd[58928]: 178.216.50.60: disconnected after 3936 seconds.
...
Apr 16 08:17:27 j102 spamd[58928]: 78.186.75.116: disconnected after 580 seconds.
...
Apr 16 21:11:30 j102 spamd[58928]: 186.60.196.6: disconnected after 470 seconds.
...
Apr 18 01:38:59 j102 spamd[58928]: 190.20.2.201: disconnected after 550 seconds.
...
Apr 18 05:20:39 j102 spamd[58928]: 84.77.149.238: disconnected after 540 seconds.
...