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Valdis Kletnieks <[log in to unmask]>
Tue, 23 Mar 1999 09:15:58 -0500
text/plain (112 lines)
(Sorry about the wide cross-reply, but I'm more than a tad irate)

On Mon, 22 Mar 1999 19:29:24 EST, "K.V. Rao" said:
> Recently we posted a admin message to a metar list at our site (we combine
> the lists so that only one message is received by a subscriber even if
> that person subscribed to several lists). Surprisingly, I received the
> following message that thought it was a spam message. If you read below,
> it tells that since listserv does not fill the To: field with the actual
> recipient's address, it got the spam masters attention. How can we fix
> this problem in listserv config? I want the e-mail id of the individual to
> show up in To: address line rather than
> To: Multiple Recipients of list xxx

You probably don't want to do this.

If each message has a distinct To: field, then each message has
to be sent out individually.  So instead of Listserv handing your
mail server *one* message with 4,000 recipients, it will hand it
4,000 messages with one recipient each.

>         3. you Bcc'ed the correct recipient or a mailing list the
>            recipient belongs to. Unfortunately, in order to contain
>            the menace of UCE, several email recipients now have
>            filters that reject email unless their email address, or
>            a mailing list they subscribe to, appears in the To:
>            or Cc: fields. If that is the case, you may resend your
>            original message to the following recipient by their
>            explicit email addresses. Our statistics suggest that
>            over 96% of UCE gets rejected with this policy.

96% of all UCE, and all Bcc: and many list management packages.
Listserv, Majordomo, Listproc - everybody sets the To: like this,
for the performance reason I listed above.  (Well - some small
lame list management software may actually send out lots of
copies, but it doesn't scale at *all*).

>     Our Gateway heuristics suggests the email address that may have
>     triggered this was:
>
>              <[log in to unmask]>

Please notify this person to seek internet connectivity
from a provider that has a clue.  The only way to deal
with broken providers like this is to boycott them.

The only real fix at the Listserv end is as follows:

1) 'QUIET DELETE * *@INDUS.NET' to unsubscribe any users
from that provider from any of your lists.

2) Add '*@INDUS.NET' to the Listserv 'trapin' variable so people
from that provider cannot accidentally get onto your lists and
then not be able to receive mail from them.

>              If you are operating a commercial list, please remove
>              this from it now!! If this was intended as a personal
>              email, please accept our apology and resend it to the
>              above address directly.

How about all the people who operate non-commercial lists, and
the people at this provider who would actually like to receive
mail from those lists?

>     Additionally, your email claimed to be addressed to the
>     potentially forged email address(es) quoted below. If
>     you are a spammer, you would know that it is a very
>     common practice among spammers to use a "To: " header
>     that has nothing to do with who the message is actually
>     delivered to. Sort of like writing a fictitious address
>     on an envelope but dropping it in someone else's mailbox.

It's also a very common practice to pass a memo around an
office labelled "To: All Employees".  I bet the boss would
just *LOVE* to be required to write out every name every time.

>     Since you may have intentionally abused or otherwise misused our
>     mailing system, we are adding _your_ email address to a mailing
>     list of suspected spammers. We reserve the right to sell it to
>     anyone for legal commercial advertising purposes. We do not
>     otherwise send unsolicited email.

Hmm.. and how does one get *removed* from this mailing list?

>     Due to the volume of the spam this Spam Detection Auto Reply
>     Gateway receives, and to avoid mail loops caused by auto replies,
>     all replies to this message are sent into a blackhole.

If you find it necessary to black-hole replies, maybe you're rejecting
too much mail.

>     -=-=- Always check email addresses and save everyone the trouble
>          and cost of dealing with unwanted email. -=-=-
>
>         >From [log in to unmask]  Sun Mar 21 23:34:54 1999
>         >       by indnet.org (8.9.3/8.9.3) with ESMTP id CAA25412;
>         >       Mon, 22 Mar 1999 02:36:41 -0500 (EST)
>         >          spool id 514256 for [log in to unmask]; Mon, 22 Mar 1999 00:00:11 -0500
>         >          (8.9.3/8.9.3) with ESMTP id NAA09194 for <[log in to unmask]>; Sun, 21
>         >          Mar 1999 13:42:37 -0500 (EST)
>         >Date: Sun, 21 Mar 1999 13:42:36 -0500 (EST)
>         >From: "K.V. Rao" <[log in to unmask]>
>         >To: [log in to unmask]
>         >Subject: Update on India Network - Administrivia
>         >Message-ID: <[log in to unmask]>
>         >MIME-Version: 1.0
>         >Content-Type: TEXT/PLAIN; charset=US-ASCII
>         >Sender: [log in to unmask]

                                Valdis Kletnieks
                                Computer Systems Senior Engineer
                                Virginia Tech

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