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From: Jamie Heckford (jamie_at_tridentmicrosystems.co.uk)
Date: Mon Dec 02 2002 - 05:44:42 CST

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    Hi,

    Seem to be having an odd relaying problem with postfix.

    As you can see from the below its not letting me relay from the host
    195.41.218.51?

    -- /var/log/maillog
    Dec 2 11:01:22 cobain postfix/smtpd[93280]: connect from
    unknown[195.41.218.51] Dec 2 11:01:22 cobain postfix/smtpd[93280]:
    C1E93970: client=unknown[195.41.218.51] Dec 2 11:01:22 cobain
    postfix/smtpd[93280]: reject: RCPT from unknown[195.41.218.51]: 554
    <*****mail.tele.dk>: Recipient address rejected: Relay access denied;
    from=<********.com> to=<****mail.tele.dk> 

    --

    Heres the relevant bits from my main.cf:

    -- main.cf
mynetworks = /usr/local/etc/postfix/relay-networks
relay_domains = $mynetworks, $mydestination smtpd_client_restrictions =
check_sender_access hash:/usr/local/etc/postfix/banned
smtpd_sender_restrictions = check_sender_access
hash:/usr/local/etc/postfix/banned
--

    -- relay-networks
192.168.100.0,
192.168.101.0,
192.168.105.0,
193.89.105.0,
194.207.93.0,
195.41.218.0
--

    All of the networks listed in relay-networks can send mail fine through
the box, but 195.41.218.0/24 cannot! The only difference I see is that
195.41.218.0 do not have internal/external DNS entrys like the others
do. Is this the reason? If so can I turn this feature off and have it
restricted by ip address instead of IP/matching DNS as that part of the
network is out of my control :(

    Thanks in advance for any help! :-)

    --
Jamie Heckford
Network Manager
Trident Microsystems Ltd.
jamietridentmicrosystems.co.uk

    t: +44(0)1737-780790
f: +44(0)1737-771908
w: http://www.tridentmicrosystems.co.uk/