Thanks Greg,
You have indeed cleared up an issue for me.
Regards
Greg
----- Original Message -----
From: "Greg Connor" <gconnor(_at_)nekodojo(_dot_)org>
To: <spf-discuss(_at_)v2(_dot_)listbox(_dot_)com>
Sent: Tuesday, March 16, 2004 11:06 AM
Subject: Re: [spf-discuss] Everyone Having an SPF Record Fails From This List
|
| Hi Greg,
|
| Apologies if I'm going over territory you have already covered, but in case
| not, this may be helpful.
|
| "MAIL FROM" aka. "envelope from" refers to the MAIL FROM: <xxx> command
| issued from one SMTP to another, and is different from the "From:" header
| in the mail. Basically all headers (From, To, Cc, Received, etc) are part
| of the DATA command and could possibly be different (either forged or just
| different for some reason).
|
| The exception is often "Return-Path:" especially if it is near the top of
| the message, it was probably added by your own mailer, and probably matches
| the envelope from address. (The exception is MAIL FROM: <> which may
| appear as Return-Path: <MAILER-DAEMON(_at_)your(_dot_)system>)
|
| You can experiment by feeding your smtp daemon with various values (by
| telnetting direct to your port 25) and see what it does.
|
|
| Here is a quick conversation I had with my mailer. I made the MAIL-FROM
| different from the From: address in the message to see how it came out in
| the logs and on the message.
|
| neko-base> telnet localhost 25
| Trying 127.0.0.1...
| Connected to localhost.
| Escape character is '^]'.
| 220 neko-base.nekodojo.org ESMTP Sendmail 8.11.6/8.11.6; Tue, 16 Mar 2004
| 08:00:52 -0800
| HELO localhost
| 250 neko-base.nekodojo.org Hello localhost.localdomain [127.0.0.1], pleased
| to meet you
| MAIL FROM: <the-real-sender(_at_)nekodojo(_dot_)org>
| 250 2.1.0 <the-real-sender(_at_)nekodojo(_dot_)org>... Sender ok
| RCPT TO: <gconnor(_at_)nekodojo(_dot_)org>
| 250 2.1.5 <gconnor(_at_)nekodojo(_dot_)org>... Recipient ok
| DATA
| 354 Enter mail, end with "." on a line by itself
| Subject: This is the picture
| X-Comment: milgrams 37
| To: friend(_at_)public(_dot_)com
| From: gconnor(_at_)nekodojo(_dot_)org
|
| Hello there Mr. Big Time Sledgehammer
|
| .
| 250 2.0.0 i2GG1Jl14210 Message accepted for delivery
| QUIT
| 221 2.0.0 neko-base.nekodojo.org closing connection
| Connection closed by foreign host.
|
|
| Later, good luck
|
| gregc
| --
| Greg Connor <gconnor(_at_)nekodojo(_dot_)org>
|
| -------
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