Giving spammers a harder time (cont'd)

spamd started greylisting in OpenBSD 3.5 (May 2004), in OpenBSD 4.1, spamd defaults to greylisting mode.

Typical log entries (with -v):

Oct  2 19:55:05 delilah spamd[26905]: (GREY) 83.23.213.115: 
<gilbert@keyholes.net> -> <wkitp98zpu.fsf@datadok.no> 
Oct  2 19:55:05 delilah spamd[26905]: 83.23.213.115: disconnected after 0 seconds.
Oct  2 19:55:05 delilah spamd[26905]: 83.23.213.115: connected (2/1)
Oct  2 19:55:06 delilah spamd[26905]: (GREY) 83.23.213.115: <gilbert@keyholes.net> -> 
<wkitp98zpu.fsf@datadok.no>
Oct  2 19:55:06 delilah spamd[26905]: 83.23.213.115: disconnected after 1 seconds.
Oct  2 19:57:07 delilah spamd[26905]: (BLACK) 65.210.185.131: 
<bounce-3C7E40A4B3@branch15.summer-bargainz.com> -> <adm@dataped.no>
Oct  2 19:58:50 delilah spamd[26905]: 65.210.185.131: From: Auto lnsurance Savings 
<noreply@branch15.summer-bargainz.com>
Oct  2 19:58:50 delilah spamd[26905]: 65.210.185.131: Subject: Start SAVlNG M0NEY on 
Auto lnsurance
Oct  2 19:58:50 delilah spamd[26905]: 65.210.185.131: To: adm@dataped.no
Oct  2 20:00:05 delilah spamd[26905]: 65.210.185.131: disconnected after 404 seconds. 
lists: spews1
Oct  2 20:03:48 delilah spamd[26905]: 222.240.6.118: connected (1/0)
Oct  2 20:03:48 delilah spamd[26905]: 222.240.6.118: disconnected after 0 seconds.

Newer spamd “stutters” for 10 seconds on connections from unknowns