[ale] [OT] Sendmail (?) woes

[Joe]

Josh Freeman <josh at catea.org> writes:

> 
> 
> On Wed, 2003-01-22 at 04:42, Joe wrote:
> > 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)?
>
> I believe so, but if I recall it is an easy one to fix. Many  mail
> servers will reject mail from an account that does not have a valid
> reverse DNS, and this appears to be the case. You need to make sure
> sendmail thinks it's sending mail from mydomain.org, as opposed to
> servername.mydomain.org.
> 
> I believe the line you are looking for is going to be something like
> this:
> 
> # who I masquerade as (null for no masquerading) (see also $=M)
> DMmydomain.org

Tried that, restarted sendmail, and still the same error. My
sendmail is definitely *not* masquerading as "earthlink.net",
even though I've changed "DM" to "DMearthlink.net".

Hmm...

-- Joe
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