[CLUE-Tech] MTA questions

[Dave Price]

On Sun, Dec 08, 2002 at 01:45:58PM -0700, Sean LeBlanc wrote:
> 
> The only thing is, I don't want to go futzing around with things I know
> nothing about, like qmail/sendmail/exim/whatever for no reason
> - is there any way to discern if it's my problem or AmericanISP's? The odd
> thing is that I can subscribe, no problem, and it's the same domain, but
> maybe the list software is configured to be picky about mail sent to the
> list itself...

The list server may be ignoring you if your 'from' address does not
match your subscribed address - or (more likely) your 'from address'
does not match the reverse-lookup that they do to confirm it

That is from your headers)  

you claim to be: seanleblanc at americanisp.net

but your ssmtp is id'ing you as: bedroom.lakwod3.co.home.com
(see the HELO line)
<snip>
Received: (qmail 14685 invoked from network); 8 Dec 2002 20:45:58 -0000
Received: from 216-38-48-80.ip.amisp.net (HELO
bedroom.lakwod3.co.home.com) (216.38.48.80)
  by 0 with SMTP; 8 Dec 2002 20:45:58 -0000
  Received: by bedroom.lakwod3.co.home.com (sSMTP sendmail emulation);
  Sun, 8 Dec 2002 13:45:58 -0700
  From: Sean LeBlanc <seanleblanc at americanisp.net>
  To: clue-tech at clue.denver.co.us
  Message-ID: <20021208204558.GB14781 at smtp.americanisp.net>

[davep at dp:~]$ nslookup 216.38.48.80
Server:  dbx.kinaole.org
Address:  63.225.118.101

Name:    216-38-48-80.ip.amisp.net
Address:  216.38.48.80

</snip>  

This looks like a relay/spoof to a sensitive mail server

I am not sure about ssmtp, but exim is easy to set up as a satellite
system to give the correct appearance to other servers.

You can test sending to the smtp server for your list with telnet to
port 25:

(From the 'bat' sendmail book, but I am talking to an exim host
YMMV)

[davep at dp:~]$ telnet mail.kinaole.org 25
Trying 63.225.118.101...
Connected to dbx.kinaole.org.
Escape character is '^]'.
220 dbx.kinaole.org ESMTP Exim 3.12 #1 Sun, 08 Dec 2002 14:33:49 -0700
helo dp.kinaole.org
250 dbx.kinaole.org Hello davep at dp.kinaole.org [63.225.118.97]
mail from:davep at kinaole.org       # the truth
503 Sender already given		  # he knows
mail from: nobody at yahoo.com		  # try to lie
503 Sender already given          # he knows
rcpt to:davep at kinaole.org
250 <davep at kinaole.org> is syntactically correct
data
354 Enter message, ending with "." on a line by itself
Test
.
250 OK id=18L95v-0006Nd-00
quit
221 dbx.kinaole.org closing connection
Connection closed by foreign host.

HTH

aloha,
dave