Postfix greylisting

On a lark, I decided to implement greylisting on my mail server. It was as easy as "apt-get install postgrey". Well, almost that easy. I also had to add this to my /etc/postfix/main.cf:

   check_policy_service inet:127.0.0.1:60000

This was slipped in at the end of smtpd_recipient_restrictions.

Now I have a new service in /etc/init.d: postgrey

And my logs look like this:

Oct 17 16:09:44 localhost postfix/smtpd[32111]: connect from 201-89-2-130.mganm702.dsl.brasiltelecom.net.br[201.89.2.130]
Oct 17 16:09:46 localhost postfix/smtpd[32111]: NOQUEUE: reject: RCPT from 201-89-2-130.mganm702.dsl.brasiltelecom.net.br[201.89.2.130]: 504 <major>: Helo command rejected: need fully-qualified hostname; from=<AngelinaexceptKern@linksys.com> to=<sam@finninday.net> proto=SMTP helo=<major>
Oct 17 16:09:46 localhost postfix/smtpd[32111]: lost connection after RCPT from 201-89-2-130.mganm702.dsl.brasiltelecom.net.br[201.89.2.130]
Oct 17 16:09:46 localhost postfix/smtpd[32111]: disconnect from 201-89-2-130.mganm702.dsl.brasiltelecom.net.br[201.89.2.130]

My Bayes filter might get rusty from lack of use now. Hardly anything is persistent enough to get through the greylist.