Am 16.01.2015 um 10:26 schrieb M. Fioretti:
I have just "inherited" a postfix 2.6.6 server running on a Centos 6
server, whose postconf -n output is pasted below.
Everything seems fine to me (but of course any pointer to security
holes, or possibilities for improvement is welcome!) except one thing.
This server must relay email from only two sources:
a) messages sent through the local webmail interface
b) messages coming from another server some.server.com with a fixed ip
address,xxx.yyy.www.zzz : these are all notification messages from cron
jobs/shell scripts, for several people
a) is working perfectly, b) isn't. every message from some.server.com is
rejected as follows:
Jan 16 10:04:41 server postfix/smtpd[11561]: NOQUEUE: reject: RCPT from
some.server.com[xxx.yyy.www.zzz]: 554 5.7.1
<some.server.com[212.110.184.219]>: Client host rejected: Access denied;
from=<apa...@some.server.com> to=<mfiore...@nexaima.net> proto=ESMTP
helo=<some.server.com>
"xxx.yyy.www.zzz" is not really helpful because it's possible that you
overlooked a small typo and hide us that information
*do not* mask public informations, especially if you fail to mask it on
all places because you leaked 212.110.184.219 aynways but only at one
place and so we miss the context
