なにしろSubjectが『Bulk Email Sending』ですから。
苦情はspam cop経由とこちらからと、２つのルートで送ってあります。
ISPからは自動返信が来ていますが、その後の正式な回答が有りましたら再度報告します。

それにしても本文の後半を見ると、アドレスは公のところから拾ってきたとか、このメールは合衆国の法に基づいて送っているからspamではないとか、いかにもspam業者らしい言い訳をしてくれています。

From info@e-mailpromo.net Wed Sep 4 10:12:59 2002
Return-Path: info@e-mailpromo.netReceived: from QRJATYDI (ip68-8-248-3.sd.sd.cox.net [68.8.248.3])
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Wed, 4 Sep 2002 10:10:25 +0900 (JST)
From: info@e-mailpromo.net
To: <＊＊@＊＊.or.jp>
Subject: Bulk Email Sending & Bullet Proof Web Hosting
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Date: Tue, 3 Sep 2002 14:54:12 +0300
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We offer you databases of e-mail addresses for advertisement mailing; we sell databases, carry out mailing
and hosting for the advertising projects. We can work on a turnkey project ? create a site with original design,
program and subject contents. Our databases are daily updated with e-mail addresses from all over the world.
Their validity and originality are verified. Today they contain over 50 million addresses. We use our own mailing
soft that can be ideally adjusted for any customer. We have a wide channel and a high power server. The
constant demand for our service allows us to keep the prices low.
http://www.e-mailpromo.net

Please contact us. We’ll be glad to answer any questions.
HTTP: www.e-mailpromo.net
E-mail: info@e-mailpromo.net
ICQ: 130982

We received your address from a public place.
We apologies if this letter have reached you by mistake. We'll not disturb you any more.
NB. This message is sent in compliance of the new email bill section 301. Under Bill S.
1618 TITLE III passed by the 105th US Congress. This message cannot be considered
Spam as long as we include the way to be Removed, Paragraph (a)(c) of S. 1618.
TO REMOVE: respond to this message with "Remove" in Subject.