Qmail Greylisting

I'm confirming the success of Qmail Greylisting on Qmail-Toaster set-up. Thanks to Jond3rd and Penoy for helping me out!

UPDATE:

Below are snippets of mail logs, spammers are very persistent.

Aug 13 04:04:10 mail greylist[26487]: IP 201.4.121.158 back too soon - temp error again
Aug 13 04:04:13 mail greylist[26488]: IP 196.217.46.237 new - temp error for adsl196-237-46-217-196.adsl196-10.iam.net.ma
Aug 13 04:04:23 mail greylist[26489]: IP 71.247.1.238 new - temp error for pool-71-247-1-238.nycmny.east.verizon.net
Aug 13 04:04:28 mail greylist[26440]: IP 190.40.102.91 new - temp error for 190.40.102.91
Aug 13 04:04:40 mail greylist[26490]: IP 66.215.99.125 new - temp error for 66-215-99-125.dhcp.malb.ca.charter.com
Aug 13 04:04:41 mail greylist[26491]: IP 84.2.185.43 new - temp error for dsl5402B92B.pool.t-online.hu
Aug 13 04:04:46 mail greylist[26492]: IP 84.2.185.43 back too soon - temp error again
Aug 13 04:04:57 mail greylist[26493]: IP 196.217.46.237 back too soon - temp error again
Aug 13 04:05:39 mail greylist[26533]: IP 87.245.133.8 is listed in RBL sbl-xbl.spamhaus.org: nat.zhukovsky.net
Aug 13 04:05:41 mail greylist[26533]: IP 87.245.133.8 new - temp error for nat.zhukovsky.net
Aug 13 04:05:59 mail greylist[26535]: IP 71.246.74.122 new - temp error for pool-71-246-74-122.bltmmd.east.verizon.net
Aug 13 04:06:06 mail greylist[26534]: IP 89.230.5.235 new - temp error for host-89-230-5-235.konstantynow.mm.pl
Aug 13 04:06:17 mail greylist[26537]: IP 72.64.107.70 new - temp error for pool-72-64-107-70.dllstx.fios.verizon.net
Aug 13 04:06:17 mail greylist[26538]: IP 72.64.107.70 back too soon - temp error again
Aug 13 04:06:23 mail greylist[26540]: IP 72.64.107.70 back too soon - temp error again
Aug 14 13:13:35 mail greylist[1456]: IP 66.190.202.236 new - temp error for 66.190.202.236
Aug 14 13:13:36 mail greylist[1463]: IP 222.120.157.156 new - temp error for 222.120.157.156
Aug 14 13:13:53 mail greylist[1494]: IP 71.110.7.214 new - temp error for pool-71-110-7-214.lsanca.dsl-w.verizon.net
Aug 14 13:13:55 mail greylist[1495]: IP 218.81.175.167 back too soon - temp error again
Aug 14 13:14:37 mail greylist[1514]: IP: 61.219.78.54 invalid HELO greeting string: localhost. Disconnecting.
Aug 14 13:14:38 mail greylist[1519]: IP 62.117.33.205 new - temp error for 62.117.33.205