RE: SMTP problems

[Tim McCarthy <TimM@xxxxxxxxxxxxxxxxxx>]

When sending e-mail over the Internet the sending domain must be one
registered by the NIC, otherwise there is way to trace a legitimate
route. The MAIL FROM domain name doesn't really have to be the same as
the host name of the machine you're sending from but if you're using the
400 SMTP server to forward mail then I'm not sure how you can spoof it. 

> -----Original Message-----
> From: Art Tostaine, Jr. [SMTP:art@link400.com]
> Sent: Monday, February 01, 1999 2:34 PM
> To:   midrange-l@midrange.com
> Subject:      SMTP problems
> 
> I am experimenting with sending mail from my AS/400 over a dialup PPP
> line.
> This would be for a once in a while thing, I won't be receiving mail
> over my
> dialup.
> 
> The mail never gets to the destination.  The SMTP flight recorder
> shows this
> message:
> 
> qtmsclnt.C  7186 getreplydata: len 59,501
> <USERID@CCA170.LINK400.COM>...
> Sender domain must exist
> qtmsclnt.C  7182 getreplydata: len 57,501
> <USERID@CCA170.LINK400.COM>...
> Sender domain must exist
> 
> The domain name is what is defined in my TCP/IP Host domain info.  I
> used
> names that I liked.  I don't particularly care what they are.
> 
> Note that I do pay an ISP to host the Link400.com domain for me, so
> that
> does exist on the internet.
> 
> I suspect it is the CCA170 part.  I can't eliminate this because it is
> my
> system name?
> 
> 
> Art Tostaine, Jr.
> CCA, Inc.
> Parlin, NJ  08859
> 
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