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Date:      Wed, 20 Dec 2000 03:51:35 -0500
From:      "Donald J . Maddox" <dmaddox@sc.rr.com>
To:        cjclark@alum.mit.edu
Cc:        Stephen McKay <mckay@thehub.com.au>, freebsd-chat@FreeBSD.ORG
Subject:   Re: No cable modems??
Message-ID:  <20001220035135.A3783@cae88-102-101.sc.rr.com>
In-Reply-To: <20001220003306.P96105@149.211.6.64.reflexcom.com>; from cjclark@reflexnet.net on Wed, Dec 20, 2000 at 12:33:06AM -0800
References:  <20001219182739.C61697@cae88-102-101.sc.rr.com> <200012200518.eBK5IsB15659@dungeon.home> <20001220003436.A345@cae88-102-101.sc.rr.com> <20001219233320.O96105@149.211.6.64.reflexcom.com> <20001220024129.A2993@cae88-102-101.sc.rr.com> <20001220003306.P96105@149.211.6.64.reflexcom.com>

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The interesting thing (at least to me) is that prior to my mail
bouncing from Ollivier, I have *never* had such an incident, not
even without using a 'smarterhost'.

RoadRunner is as antispam as any ISP can be expected to be, and
they run open relay tests on a regular basis to prevent the kind
of abuses that have been mentioned earlier in this thread...
I really cannot imagine why anyone would block my mail based solely
on the 'no cable modems here' principle...  Wow.

On Wed, Dec 20, 2000 at 12:33:06AM -0800, Crist J. Clark wrote:
> On Wed, Dec 20, 2000 at 02:41:29AM -0500, Donald J . Maddox wrote:
> 
> [snip]
> 
> > See anything wrong with the headers in this email?  Ollivier
> > (or Ollivier's ISP) does.
> 
> OK, here is the piece that would be of interest,
> 
> > Received: from Mail6.sc.rr.com (fe6.southeast.rr.com [24.93.67.53])
> >         by alum.mit.edu (8.9.3/8.9.2) with ESMTP id CAA19042
> >        for <cjclark@alum.mit.edu>; Wed, 20 Dec 2000 02:41:18 -0500 (EST)
> 
> Now, this shows you are definately relaying through your ISP's mail
> server,
> 
>   $ dig southeast.rr.com mx
> 
>   ; <<>> DiG 8.3 <<>> southeast.rr.com mx 
>   ;; res options: init recurs defnam dnsrch
>   ;; got answer:
>   ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4
>   ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 2, ADDITIONAL: 7
>   ;; QUERY SECTION:
>   ;;      southeast.rr.com, type = MX, class = IN
> 
>   ;; ANSWER SECTION:
>   southeast.rr.com.       1H IN MX        100 mail6.southeast.rr.com.
>   .
>   .
>   .
>   ;; ADDITIONAL SECTION:
>   mail6.southeast.rr.com.  1H IN A  24.93.67.53
> 
> However, this might be trouble,
> 
>   $ dig Mail6.sc.rr.com
> 
>   ; <<>> DiG 8.3 <<>> Mail6.sc.rr.com 
>   ;; res options: init recurs defnam dnsrch
>   ;; got answer:
>   ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4
>   ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2
>   ;; QUERY SECTION:
>   ;;      Mail6.sc.rr.com, type = A, class = IN
> 
>   ;; ANSWER SECTION:
>   Mail6.sc.rr.com.        23h56m20s IN A  24.93.67.181
>   .
>   .
>   .
> 
> Your mailserver seems to be using a name, Mail6.sc.rr.com, that does
> not agree with the IP, 24.93.67.53 (or vice versa).
> 
> Still, it's weird. You might want to consider a mail to the
> 'postmaster's at both ISPs. They should really work this out. It looks

I don't really see anything unusual about this...  It's pretty common
for mail.whatever.domain to be an alias, no?  I think every ISP I have 
ever used had a mail gateway called mail*.whatever.domain that resolved
to some other host than 'mail'.


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