But the record did not stand for long:
peter@delilah:~$ grep disconnected /var/log/spamd | awk '{print $9}' | sort -rn | uniq -c | head
1 42673
1 36099
1 22659
1 18693
1 14714
1 10170
1 6316
1 6200
1 6199
1 619442673 seconds = almost twelve hours! (others have reported >60K seconds)
Dec 21 14:22:44 delilah spamd[29949]: 85.152.224.147: connected (5/2) Dec 21 14:22:46 delilah spamd[29949]: 85.152.224.147: connected (6/2) Dec 21 14:22:47 delilah spamd[29949]: 85.152.224.147: disconnected after 3 seconds. Dec 22 02:13:59 delilah spamd[29949]: 85.152.224.147: disconnected after 42673 seconds.
Also see Connection lengths