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Re: Greg Woods... where are you?
From: "Jay R. Ashworth" <jra () scfn thpl lib fl us>
Date: Mon, 21 Jul 1997 17:33:42 -0400

On Mon, Jul 21, 1997 at 03:57:30PM -0400, Greg A. Woods wrote:
|------------------------- Failed addresses follow: ---------------------|
 <woods () weird com> ... transport smtp: 550 '<jra () scfn thpl lib fl us>SIZE=2483' sender address target 
'scfn.thpl.lib.fl.us' is not a valid domain (no MX record).

The error says exactly what it means.  (FYI I've had it up to here with
spam and I'm not accepting mail from anyone who can't get their DNS right.)

I dislike to have to correct hats, but...

get a real mailer.

Script started on Mon Jul 21 17:28:47 1997
bash$ ns
Default Server:  ns1.thpl.lib.fl.us
set q=any
Server:  ns1.thpl.lib.fl.us

        mailbox = bbrush.scfn.thpl.lib.fl.us
        text = contact.thpl.lib.fl.us
scfn.thpl.lib.fl.us     CPU = SPARCstation 20/51        OS = SunOS 4.1.4
scfn.thpl.lib.fl.us     internet address =
thpl.lib.fl.us  nameserver = ns1.thpl.lib.fl.us
ns1.thpl.lib.fl.us      internet address =

script done on Mon Jul 21 17:29:13 1997

Your DNS is rather sparse of MX records.  You might want to add at least
the following as well:

      thpl.LIB.fl.us.         MX      1 scfn.thpl.lib.fl.us.
      scfn.thpl.LIB.fl.us.    MX      1 scfn.thpl.lib.fl.us.

Either that or use a return address of <jra () ns1 thpl lib fl us>
(i.e. the "MAIL FROM:" address given in the SMTP envelope).

The return address you should have had was "jra () baylink com".
baylink.com MX's to scfn.thpl.lib.fl.us, which is an A record.

$ ns -q=any baylink.com
Server:  ns1.thpl.lib.fl.us

        origin = ns1.thpl.lib.fl.us
        mail addr = jra.scfn.thpl.lib.fl.us
        serial = 960502
        refresh = 3600 (1 hour)
        retry   = 300 (5 mins)
        expire  = 3600000 (41 days 16 hours)
        minimum ttl = 3600 (1 hour)
baylink.com     nameserver = ns1.thpl.lib.fl.us
baylink.com     CPU = SPARCstation 20/51        OS = SunOS 4.1.3_U1
        mailbox = jra.scfn.thpl.lib.fl.us
        text = contact.baylink.com
baylink.com     preference = 1, mail exchanger = scfn.thpl.lib.fl.us
baylink.com     nameserver = ns1.thpl.lib.fl.us
ns1.thpl.lib.fl.us      internet address =
scfn.thpl.lib.fl.us     internet address =

Apologies to the NANOG list, but until Greg makes his mailer a littl
less (incorrectly) anal-retentive, he otherwise won't see this... and
I'd hate for an ops guy not to know that his gear is configured wrong.

-- jra
Jay R. Ashworth                                                jra () baylink com
Member of the Technical Staff             Unsolicited Commercial Emailers Sued
The Suncoast Freenet      "People propose, science studies, technology
Tampa Bay, Florida          conforms."  -- Dr. Don Norman      +1 813 790 7592

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