I installed spamd-4.9.1_2 and wanted to use its blacklist und tarpitting capabilities which I were used to in OpenBSD. If you are using the 'nixspam' and 'uatraps' lists for blacklisting mode nearly 100.000 entries need to be inserted to a pf table. The debug output looks likes this: foo@bar#: spamd-setup -d -b Getting http://www.openbsd.org/spamd/nixspam.gz blacklist nixspam 40000 entries Getting http://www.openbsd.org/spamd/traplist.gz blacklist uatraps 65946 entries foo@bar#: pfctl: Bad address. It seems that the pfctl ioctl buffer is to small to load that much entries. If I remembered correct this problem wasn't there in FreeBSD 9 and I didn't see it in OpenBSD. There is also a FreeBSD Forum post from another guy regarding the same problem: https://forums.freebsd.org/viewtopic.php?t=45879
This was first tackled in r286862, and fully fixed in r296025 (see bug #207463).