Re: [cobalt-users] email may be forged ? what gives?

["Ted" <ted@xxxxxxxxxxxxxxx>]

thank you for the insight. I will forward this to the client and have him
take the issue up with his
provider.


----- Original Message ----- 
From: "Larry Smith" <lesmith@xxxxxxxxx>
To: <cobalt-users@xxxxxxxxxxxxxxx>
Sent: Tuesday, September 16, 2003 9:07 AM
Subject: Re: [cobalt-users] email may be forged ? what gives?


> On Tuesday 16 September 2003 08:47, Ted wrote:
> > Sep 16 09:36:48 dserv1 in.qpopper[32361]: (v?) POP login by user
"user101"
> > at (cdm-6-15-10.rsvl.cox-internet.com) 66.233.15.10 [pop_pass.c:1023]
> >
> >
> > Sep 16 09:37:37 dserv1 sendmail[32373]: JAA32373: ruleset=check_rcpt,
> > arg1=<test101@xxxxxxxxxxx>, relay=cdm-66-15-10.rsvl.cox-internet.com
> > [66.233.15.10] (may be forged), reject=550 <test101@xxxxxxxxxxx>...
> > Relaying denied
> >
> > Sep 16 09:37:37 dserv1 sendmail[32373]: JAA32373: ruleset=check_rcpt,
> > arg1=<ted@xxxxxxxxxxxxxxxxxxxx>,
relay=cdm-66-15-10.rsvl.cox-internet.com
> > [66.233.15.10] (may be forged), reject=550 <ted@xxxxxxxxxxxxxxxxxxxx>...
> > Relaying denied
> >
> > Sep 16 09:37:40 dserv1 sendmail[32373]: JAA32373:
> > from=<test101@xxxxxxxxxxxxxxxxx>, size=0, class=0, pri=0, nrcpts=0,
> > proto=ESMTP, relay=cdm-66-15-10.rsvl.cox-internet.com [66.233.15.10]
(may
> > be forged)
> >
> > I have this client who all of a sudden can not send mail and gets this
> > relay not allowed error. Was working for over a year. To temp fix I
added
> > the IP into the relay allow list on the server. The server is an old
Cobalt
> > RAQ2.
> >
>
> The error is because DNS is not working in "both" directions.  That is
what
> the "may be forged" message is telling you:
>
> beowulf:~ # host 66.233.15.10
> 10.15.233.66.in-addr.arpa domain name pointer
> cdm-66-15-10.rsvl.cox-internet.com.
> beowulf:~ # host cdm-66-15-10.rsvl.cox-internet.com
> Host cdm-66-15-10.rsvl.cox-internet.com not found: 3(NXDOMAIN)
>
> The IP resolves to the name, but the name does not resolve back to the
IP....
>
> -- 
> Larry Smith
> SysAd ECSIS.NET
> sysad@xxxxxxxxx
>
>
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