Date: Fri, 5 Apr 2002 18:16:59 +0930 From: Greg Lehey <grog@lemis.com> To: "Philip J. Koenig" <pjklist@ekahuna.com> Cc: Questions@FreeBSD.ORG, Kris Kennaway <kris@obsecurity.org> Subject: Re: hub.freebsd.org spam policy Message-ID: <20020405181659.T68310@wantadilla.lemis.com> In-Reply-To: <20020405075914777.AAA405@empty1.ekahuna.com@pc02.ekahuna.com> References: <20020404214543823.AAA153@empty1.ekahuna.com@pc02.ekahuna.com>; <20020405075914777.AAA405@empty1.ekahuna.com@pc02.ekahuna.com>
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On Thursday, 4 April 2002 at 23:59:15 -0800, Philip J. Koenig wrote:
> On 4 Apr 2002, at 23:25, Kris Kennaway boldly uttered:
>
>> On Thu, Apr 04, 2002 at 01:45:43PM -0800, Philip J. Koenig wrote:
>> [I asserted that freebsd.org was using spam assassin based on some
>> list traffic I had seen]
>>
>> On Tue, 26 Mar 2002, Philip J. Koenig wrote:
>>> the specifics so I can take it up with the "anti-spam" utility
>>> authors. ("Spam-Assassin", if I'm not mistaken)
>>>
>>
>> we dont use "Spam-Assassin". never have.
>>
>> [end of message]
I missed this in the mass of verbiage in the earlier messages.
spamassassin is in fact quite useful, though it doesn't detect
messages with forged senders, the kind of problem that this message
would have caused had the sending MTA had reverse lookup:
Transcript of session follows.
Out: 220 wantadilla.lemis.com ESMTP Postfix
In: EHLO mydomain.com
Out: 250-wantadilla.lemis.com
Out: 250-PIPELINING
Out: 250-SIZE 10240000
Out: 250-ETRN
Out: 250 8BITMIME
In: RSET
Out: 250 Ok
In: MAIL FROM:<webmaster@hotmail.com>
Out: 250 Ok
In: RCPT TO:<majordomo@lemis.com>
Out: 450 Client host rejected: cannot find your hostname, [202.73.166.164]
In: RSET
Out: 250 Ok
In: QUIT
Out: 221 Bye
BTW, does anybody understand why spam lists now include majordomo@?
I've written a series of procmail rules to catch this stuff, something
like:
:0
* ^Received: .*hotmail.com \[
/var/mail/grog
:0
* ^From: .*@hotmail.com
/home/grog/Mail/caughtspam
While looking at this, of course, consider this alternative message
which also bounced:
Transcript of session follows.
Out: 220 wantadilla.lemis.com ESMTP Postfix
In: EHLO localhost.localdomain
Out: 250-wantadilla.lemis.com
Out: 250-PIPELINING
Out: 250-SIZE 10240000
Out: 250-ETRN
Out: 250 8BITMIME
In: MAIL From:<uis@daum.net> SIZE=13237 BODY=8BITMIME
Out: 250 Ok
In: RCPT To:<grog@lemis.com>
Out: 450 Client host rejected: cannot find your hostname, [61.37.27.30]
I don't know if it's spam or not. It's definitely misconfigured.
Anyway, it's about time somebody ported spamassassin. It catches most
spam, and it doesn't seem to have too many false positives.
Greg
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