Hi Scott: Granted, based on http://www.dnsreport.com/tools/dnsreport.ch?domain=skanskausa.com this domain is a mess - but, it DOES have a MX record and the lowest priority MX record (5) has an "A" record and IS even answered. Most of the cc:'s in this email when to @skanskausa.com and WERE indeed delivered - proving that MAILFROM is valid.
So, why did this fail MAILFROM: Received: from mlx-sku-par-1.skubi.com [12.3.242.12] by mail.webhost.hm-software.com with ESMTP (SMTPD32-7.07) id AC05147F0162; Fri, 30 May 2003 11:43:01 -0400 Received: from mlx-sku-par-1.skubi.com ([127.0.0.1]) by mlx-sku-par-1.skubi.com with Microsoft SMTPSVC(5.0.2195.5329); Fri, 30 May 2003 11:38:19 -0400 Received: by mlb-sku-par-1.skanskausa.com with Internet Mail Service (5.5.2653.19) id <L9132BXP>; Fri, 30 May 2003 11:41:00 -0400 Message-ID: <[EMAIL PROTECTED]> From: ...removed... To: ...removed... Cc: ...removed..., ...removed... ...removed..., ...removed... ...removed..., ...removed... ...removed... Subject: MDY Date: Fri, 30 May 2003 11:42:01 -0400 Importance: high X-Priority: 1 Return-Receipt-To: [EMAIL PROTECTED]> MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/html; charset="iso-8859-1" Return-Path: [EMAIL PROTECTED] X-OriginalArrivalTime: 30 May 2003 15:38:19.0640 (UTC) FILETIME=[7EEB4F80:01C326C1] X-Declude-Note: Domain mlx-sku-par-1.skubi.com has no MX or A records. X-Declude: Version 1.70i1; D7c05147f0162cb7b.SMD from gateway1.skubi.com [12.3.242.12] X-Declude: Triggered MAILFROM, HELOBOGUS, IPNOTINMX, NOLEGITCONTENT [3] X-Countries: UNITED STATES->destination Return-Path: <[EMAIL PROTECTED]> X-Spam-Prob: 0.768622 Best Regards Andy Schmidt Phone: +1 201 934-3414 x20 (Business) Fax: +1 201 934-9206 --- [This E-mail was scanned for viruses by Declude Virus (http://www.declude.com)] --- This E-mail came from the Declude.JunkMail mailing list. To unsubscribe, just send an E-mail to [EMAIL PROTECTED], and type "unsubscribe Declude.JunkMail". The archives can be found at http://www.mail-archive.com.