Recipient address rejected: Access denied from gmail

[6233maxxer]

Hi.
In the last days I'm seldomly getting error messages like this:

Dec 1 10:44:01 posta postfix/smtpd[8250]: connect from mail-wm0-f68.google.com[74.125.82.68]
Dec 1 10:44:01 posta postfix/smtpd[8250]: setting up TLS connection from mail-wm0-f68.google.com[74.125.82.68]
Dec 1 10:44:01 posta postfix/smtpd[8250]: Anonymous TLS connection established from mail-wm0-f68.google.com[74.125.82.68]: TLSv1 with cipher RC4-
SHA (128/128 bits)
Dec 1 10:44:02 posta postfix/smtpd[8250]: NOQUEUE: reject: RCPT from mail-wm0-f68.google.com[74.125.82.68]: 450 4.7.1 <mareghello@domain.it>: Recipient address rejected: Access denied; from=<robxxxxx@gmail.com> to=<mareghello@domain.it> proto=ESMTP helo=<mail-wm0-f68.google.com>
Dec 1 10:44:02 posta postfix/smtpd[8250]: disconnect from mail-wm0-f68.google.com[74.125.82.68]

I made another test right now sending from gmail to another recipient and it worked perfectly. I have no MTA restrictions enabled. This happens at times to several recipients. Mailbox nor domain are in maintenance, so how can this happen?

I also have a strange issue. I moved this server to a new public and private IP address (from 10.0.0.0/24 to 192.168.1.0/24). The server has now 192.168.1.102, the MyNetworks is set up accordingly, but when I send an email I see


Dec 1 10:58:52 posta amavis[15601]: (15601-02) Open relay? Nonlocal recips but not originating: recipient@externaldomain.it

This is my current config

zimbraMtaMyNetworks: 127.0.0.0/8 192.168.1.0/24 [::1]/128

What could it be? Expecially for the first problem, since the latest is not causing any malfunction.
thanks

[6233maxxer]

found the error in /opt/zimbra/logs/cbpolicyd.log:



[2015/12/01-14:48:19 - 29960] [CBPOLICYD] INFO: Got request #7 (pipelined)

[2015/12/01-14:48:19 - 29960] [GREYLISTING] ERROR: Database insert failed: cbp::dblayer::DBDo(125): Error executing command '

%09%09%09%09%09%09%09%09%09INSERT INTO greylisting_autowhitelist

%09%09%09%09%09%09%09%09%09%09(TrackKey,Added,LastSeen,Comment)

%09%09%09%09%09%09%09%09%09VALUES

%09%09%09%09%09%09%09%09%09%09(

%09%09%09%09%09%09%09%09%09%09%09'SenderIP:74.125.82.0/24',

%09%09%09%09%09%09%09%09%09%09%09'1448977698',

%09%09%09%09%09%09%09%09%09%09%09'1448977698',

%09%09%09%09%09%09%09%09%09%09%09'Auto-whitelisted: TotalCount/Required = 16/10, Percentage/Threshold/Required = 100/70'

%09%09%09%09%09%09%09%09%09%09)

%09%09%09%09%09%09%09%09': column TrackKey is not unique

[2015/12/01-14:48:37 - 29960] [CBPOLICYD] INFO: Got request #8 (pipelined)