[ale] [OT] Sendmail (?) woes

[Joe]

Hi folks,

I'm trying to send mail to someone at sun.com, but my mail
is always returned with:

>    ----- The following addresses had permanent fatal errors -----
> <andrew.holt at sun.com>
>     (reason: 501 <joe at orado.localdomain.private>... Sender domain must exist)
> 
>    ----- Transcript of session follows -----
> ... while talking to mx3.sun.com.:
> >>> MAIL From:<joe at orado.localdomain.private> SIZE=1821
> <<< 501 <joe at orado.localdomain.private>... Sender domain must exist

Why does my delivery agent say "From:<joe at orado.localdomain.private>"
when I'm explicitly setting the From: line to "jknapka at earthlink.net",
(below)? Is this a sendmail.cf thing (shudder)?

Thanks in advance (and hoping I can even send this message),

-- Joe 

> 501 5.6.0 Data format error
> Reporting-MTA: dns; earthlink.net
> Received-From-MTA: DNS; localhost
> Arrival-Date: Wed, 22 Jan 2003 02:37:00 -0700
> 
> Final-Recipient: RFC822; andrew.holt at sun.com
> Action: failed
> Status: 5.5.2
> Diagnostic-Code: SMTP; 501 <joe at orado.localdomain.private>... Sender domain must exist
> Last-Attempt-Date: Wed, 22 Jan 2003 02:37:01 -0700
> From: Joe <jknapka at earthlink.net>
> Subject: JKForth
> To: andrew.holt at sun.com, joe at orado.localdomain.private
> Date: Wed, 22 Jan 2003 02:37:00 -0700
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