CDR: Re: CIA in Oregon, Intelink

[Alex B. Shepardsen]

On Sun, 29 Oct 2000 brflgnk at cotse.com wrote:

> Quoting "Alex B. Shepardsen" <abs at squig.org>:

> Many SMTP servers disable EXPN and VRFY for security reasons,
> typically by returning failure messages.

True. (Well, most actually return access denied messages.) But in this
case, the user most likely doesn't exist. I was on the wrong trail with
mail.bend.com. mail.bendnet.com exists as well, and is a sendmail
server. Note the successful EXPN operation for "root" on that server, but
the failed VRFY and EXPN for mueller.

abs at snuffy abs]$ telnet mail.bend.com 25
Trying 199.2.205.69...
Connected to mail.bend.com.
Escape character is '^]'.
220 X1 NT-ESMTP Server mail.bend.com (IMail 6.04 64563-1)
helo squig.org
250 hello mail.bend.com
mail from: nobody at squig.org
250 ok
rcpt to:mueller
550 unknown user <mueller>
rcpt to:mueller at bendnet.com
550 not local host bendnet.com, not a gateway
rcpt to:mueller at bend.com
550 unknown user <mueller at bend.com>
quit
221 Goodbye
Connection closed by foreign host.

[abs at snuffy abs]$ telnet mail.bendnet.com 25
Trying 199.2.205.68...
Connected to mail.bendnet.com.
Escape character is '^]'.
220 mail.bendnet.com ESMTP Sendmail 8.10.0/8.10.0/BENDNET-MX.wh; Sun, 29
Oct 2000 20:08:10 -0800 (PST)
helo squig.org
250 mail.bendnet.com Hello adsl-63-202-76-26.dsl.snfc21.pacbell.net
[63.202.76.26], pleased to meet you
expn mueller
550 5.1.1 mueller... User unknown
vrfy mueller
550 5.1.1 mueller... User unknown
expn mueller at bendnet.com
550 5.1.1 mueller at bendnet.com... User unknown
expn root
250-2.1.5 Spencer Dahl <sdahl at mail.bendnet.com>
250 2.1.5 <vince at blue-box.net>
quit
221 2.0.0 mail.bendnet.com closing connection
Connection closed by foreign host.
[abs at snuffy abs]$ 
 

Alexandra