[CentOS] Postgrey not working
Mike Burger
mburger at bubbanfriends.org
Wed Jun 19 14:38:25 UTC 2019
On 2019-06-19 04:01, Nicolas Kovacs wrote:
> Hi,
>
> I have a working installation of Postfix and Dovecot that works nicely.
> I've added SpamAssassin, which does a good job of flagging spam. Now I
> wanted to add greylisting to my server.
>
> Here's what I did.
>
> $ sudo yum install postgrey
>
> Increase the greylisting delay.
>
> # /etc/sysconfig/postgrey
> POSTGREY_OPTS="--delay=300"
>
> Edit /etc/postfix/main.cf accordingly.
>
> smtpd_recipient_restrictions =
> permit_mynetworks,
> permit_auth_destination,
> permit_sasl_authenticated,
> check_policy_service unix:/var/spool/postfix/postgrey/socket,
> reject
>
> Start/restart services.
>
> $ sudo systemctl enable postgrey
> $ sudo systemctl start postgrey
> $ sudo systemctl restart postfix
>
> Now Postgrey seems to be running OK.
>
> $ systemctl status postgrey
> ● postgrey.service - Postfix Greylisting Service
> Loaded: loaded (/usr/lib/systemd/system/postgrey.service; enabled;
> vendor preset: disabled)
> Active: active (running) since mer. 2019-06-19 09:39:04 CEST; 19min
> ago
> Docs: man:postgrey(8)
> Process: 5228 ExecStart=/usr/sbin/postgrey
> --unix=/var/spool/postfix/postgrey/socket
> --pidfile=/var/run/postgrey.pid --group=postgrey --user=postgrey
> --greylist-text=Greylisted for %%s seconds --daemonize $POSTGREY_OPTS
> (code=exited, status=0/SUCCESS)
> Process: 5225 ExecStartPre=/bin/rm -f /var/run/postgrey.pid
> (code=exited, status=0/SUCCESS)
> Main PID: 5229 (/usr/sbin/postg)
> CGroup: /system.slice/postgrey.service
> └─5229 /usr/sbin/postgrey
> --unix=/var/spool/postfix/postgrey/socket --pidfile=/var/run/p...
>
> juin 19 09:39:03 sd-100246 systemd[1]: Starting Postfix Greylisting
> Service...
> juin 19 09:39:04 sd-100246 postgrey[5229]: Process Backgrounded
> juin 19 09:39:04 sd-100246 postgrey[5229]: 2019/06/19-09:39:04 postgrey
> (type Net::Server::Multi...29)
> juin 19 09:39:04 sd-100246 postgrey[5229]: Binding to UNIX socket file
> "/var/spool/postfix/postg...et"
> juin 19 09:39:04 sd-100246 postgrey[5229]: Setting gid to "238 238"
> juin 19 09:39:04 sd-100246 systemd[1]: Started Postfix Greylisting
> Service.
> juin 19 09:39:04 sd-100246 postgrey[5229]: Setting uid to "994"
>
> The only problem is that there's no greylisting. I tried to send mails
> from various mail servers to this machine. Everything gets delivered
> immediately, and there's no greylisting action in /var/log/maillog.
Did you include this line:
postgrey unix - n n - -
/var/spool/postfix/postgrey/socket
in your /etc/postix/master.cf file?
--
Mike Burger
http://www.bubbanfriends.org
"It's always suicide-mission this, save-the-planet that. No one ever
just stops by to say 'hi' anymore." --Colonel Jack O'Neill, SG1
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