On Sunday 24 August 2003 10:09 pm, Mike Vanecek  wrote:
> On Sun, 24 Aug 2003 14:00:08 -0700, Robin Lynn Frank wrote
>
> > On Sunday 24 August 2003 01:04 pm, Mike Vanecek  wrote:
> > > [EMAIL PROTECTED] postfix]# grep reject /var/log/maillog
> > > Aug 24 04:37:31 www postfix/smtpd[2917]: EC710E0541: reject: RCPT from
> > > unknown[195.18.71.121]: 450 Client host rejected: cannot find your
> > > hostname, [195.18.71.121];
> > > from=<[EMAIL PROTECTED]> to=<me>
> > > proto=ESMTP helo=<mail.readershouse.nl>
> >
> > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> >
> > Do you think that has something to do with the problem?  I checked
> > our logs and nothing from sourceforge.net produces anything similar.
> >
> > So I have to ask a dumb question and ask why is your mail coming
> > from a host other than lists.sourceforge.net?????
>
> Good question. Normally, it does not. Note that I have one being rejected
> from the unknown host and another being accepted from the list.
>
> Aug 24 01:50:51 www postfix/smtpd[24091]: connect from
> unknown[195.18.71.121]
>
> Aug 24 01:50:51 www postfix/smtpd[24091]: 901D7E0541:
> client=unknown[195.18.71.121]
>
> Aug 24 01:50:56 www postfix/smtpd[24091]: 901D7E0541: reject: RCPT from
> unknown[195.18.71.121]: 450 Client host rejected:
> cannot find your hostname, [195.18.71.121];
> from=<[EMAIL PROTECTED]> to=<me> proto=ESMTP
> helo=<mail.readershouse.nl>
>
> Aug 24 01:50:59 www postfix/smtpd[24091]: disconnect from
> unknown[195.18.71.121]
>
> Aug 24 01:54:04 www postfix/smtpd[24095]: connect from
> lists.sourceforge.net[66.35.250.206]
>
> Aug 24 01:54:04 www postfix/smtpd[24095]: 40293E0541:
> client=lists.sourceforge.net[66.35.250.206]
>
> Aug 24 01:54:13 www postfix/cleanup[24096]: 40293E0541:
> message-id=<[EMAIL PROTECTED]>
>
> Aug 24 01:54:13 www postfix/nqmgr[2286]: 40293E0541:
> from=<[EMAIL PROTECTED]>, size=5876, nrcpt=1
> (queue active)
>
> Aug 24 01:54:13 www postfix/smtpd[24095]: disconnect from
> lists.sourceforge.net[66.35.250.206]
>
> My first thought was that it was the monthly subscription check. Evidently,
> that thought was wrong.
>
> Possibly the attempt is from a spammer with forged information? The
> "to=<me>" address is unique to this list. That means that whomever is
> sending the message got my address from this list or the list server.
>
> I am now getting three rejects at around the same time. I suspect that
> means the spammer has sent me additional copies of the spam. I think I will
> add a drop in my iptables on that ip address and save postfix from having
> to be concerned with the problem.
>
>
>
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> https://lists.sourceforge.net/lists/listinfo/spamassassin-talk
Maaybe someone should test if readershouse.nl is an open relay or open proxy.

What is strange is this:

$ dig readershouse.nl

; <<>> DiG 9.2.2 <<>> readershouse.nl
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 46116
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;readershouse.nl.               IN      A

;; AUTHORITY SECTION:
readershouse.nl.        86400   IN      SOA     ns1.qinip.net. 
hostmaster.qinip.net. 2003012201 28800 7200 604800 86400

;; Query time: 191 msec
;; SERVER: 192.168.0.1#53(192.168.0.1)
;; WHEN: Mon Aug 25 07:55:19 2003
;; MSG SIZE  rcvd: 93

-- 
Robin Lynn Frank | Director of Operations | Paradigm-Omega, LLC
© 2003 Paradigm-Omega, LLC.  All rights reserved.
Unauthorized reproduction and/or dissemination is forbidden.

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