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Hi Kevin-
2.3.2 defines the "client" as the sending
host attempting to pass a message to an SMTP "server" host:
"In RFC 821, the two hosts participating in an SMTP transaction were
described as the "SMTP-sender" and "SMTP-receiver". This
document
has been changed to reflect current industry
terminology and hence
refers to them as the "SMTP
client" (or sometimes just "the client")
and "SMTP
server" (or just "the server"), respectively...."
And 4.1.1.1, which you quoted,
defines the EHLO/HELO string:
"These commands
are used to identify the SMTP client to the SMTP
server.
The argument field contains the fully-qualified domain
name
of the SMTP client if one is
available..."
I would suggest that the FQDN
of my IMail "client" is what I entered into the IMail Administrator
applet as the Host Name, not
"mail.whatever_domain_is_trying_to_send.tld"
-d
----- Original Message -----
Sent: Thursday, January 12, 2006 2:41
PM
Subject: RE: [IMail Forum] Blacklisted by
Imail "feature"
Hi
Dave,
Excellent request.
We're digging into this some
more, trying to figure out a way to comply with the IETF standard while
also providing an "optional" feature to address this issue. Certainly the
messaging space has changed over the years (especially around spam, blacklists, etc.) and
some of the original standards can sometimes be dated or restrictive.
Here's a snippet from RFC
2821:
4.1.1.1 Extended HELLO (EHLO) or HELLO (HELO)
"These commands are used to identify
the SMTP client to the SMTP
server. The argument field
contains the fully-qualified domain name
of the SMTP client if
one is available. In situations in which the
SMTP client
system does not have a meaningful domain name (e.g., when
its
address is dynamically allocated and no reverse mapping record is
available), the client
SHOULD send an address literal (see section
4.1.3), optionally
followed by information that will help to identify
the client
system. y The SMTP server identifies itself to the SMTP
client in the connection greeting reply and in the response to
this
command."
bye for now,
kg
It would be good to
make it optional.
Any chance of a patch?
----- Original Message -----
Sent: Thursday, January 12, 2006
11:11 AM
Subject: Re: [IMail Forum]
Blacklisted by Imail "feature"
cannot be stopped at this time other
than assigning an IP address to each domain.
Eric S
----- Original Message -----
Sent: Thursday, January 12, 2006
10:52 AM
Subject: Re: [IMail Forum]
Blacklisted by Imail "feature"
Hi Eric-
I got CBL to whitelist us in
November and thought the problem was solved. Then it happened again
yesterday with Comcast, and it seems like a good idea to turn this off
as other admins get the idea that they can detect spammers this
way.
I looked in the archives and
couldn't find anything lately. If anybody knwos how to stop this, please
let me know.
-d
----- Original Message -----
Sent: Thursday, January 12, 2006
9:45 AM
Subject: Re: [IMail Forum]
Blacklisted by Imail "feature"
Check the archives. This was being
discussed over the last week or so. This comes up every once in a
while. Usually if you contact CBL they will permanently whitelist you
so you don't get listed again. The actual test is way to restrictive
which makes it just about invalid for those running IMail and some
other server packages which impersonate the virtual domains in their
HELO/EHLO strings.
Eric S
----- Original Message -----
Sent: Thursday, January 12,
2006 12:16 AM
Subject: [IMail Forum]
Blacklisted by Imail "feature"
Hi, all-
Running Imail 8.15 here, but
this applies to many other versions.
I have recently been
blacklisted by CBL and Comcast as a result of a feature that appears
to be unique to IMail. It seems that there is some way in which, for outgoing mail,
Imail identifies itself as "mail." followed by whatever domain
originates the email. Since I have several hundred domains, that
means the server identifies itself as several hundred domains, all
at one IP address. To uneducated recipients, this looks like a spam
generator.
Several other users on the
Declude list report similar problems.
Is there a way to shut off
this function so the server always identifies itself with the
official host name?
-Dave Doherty
Skywaves,
Inc.
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