A *really* good anti-spam/email company - an open relay and they bounce mail to both abuse@ and postmaster@. They are also listed in L2 of SPEWS.
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From MAILER-DAEMON Thu Apr 7 22:46:12 2005
From: postmaster@gfimalta.com To: track@Plectere.com Date: Fri, 8 Apr 2005 07:44:13 +0200 MIME-Version: 1.0 Content-Type: multipart/report; report-type=delivery-status; boundary="9B095B5ADSN=_01C53B8BE76FEABE00007F02MAILFAXSRV.gfima" X-DSNContext: 335a7efd - 4523 - 00000001 - 80040546 Subject: Delivery Status Notification (Failure) X-OriginalArrivalTime: 08 Apr 2005 05:48:27.0402 (UTC) FILETIME=[95FC9EA0:01C53BFE]
This is a MIME-formatted message. Portions of this message may be unreadable without a MIME-capable mail program.
--9B095B5ADSN=_01C53B8BE76FEABE00007F02MAILFAXSRV.gfima Content-Type: text/plain; charset=unicode-1-1-utf-7
This is an automatically generated Delivery Status Notification.
Delivery to the following recipients failed.
postmaster@gfi.com abuse@gfi.com
--9B095B5ADSN=_01C53B8BE76FEABE00007F02MAILFAXSRV.gfima Content-Type: message/delivery-status
Reporting-MTA: dns;MAILFAXSRV.gfimalta.com Received-From-MTA: dns;mailgate_old.gfi.com Arrival-Date: Fri, 8 Apr 2005 07:44:13 +0200
Final-Recipient: rfc822;postmaster@gfi.com Action: failed Status: 5.1.1
Final-Recipient: rfc822;abuse@gfi.com Action: failed Status: 5.1.1
--9B095B5ADSN=_01C53B8BE76FEABE00007F02MAILFAXSRV.gfima Content-Type: message/rfc822
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Paul Shupak track@plectere.com