{"id":584,"date":"2024-08-01T17:53:57","date_gmt":"2024-08-01T17:53:57","guid":{"rendered":"https:\/\/millermattson.com\/dave\/?p=584"},"modified":"2024-08-01T18:07:37","modified_gmt":"2024-08-01T18:07:37","slug":"the-evolution-of-email-headers","status":"publish","type":"post","link":"https:\/\/millermattson.com\/dave\/?p=584","title":{"rendered":"The Evolution of Email Headers"},"content":{"rendered":"\n<p>Early email messages contained a few simple header fields that recorded the sender, the recipient, and the path the message took through one or more intermediate email servers. Occasional spam was not yet a big deal. Here are all the email headers from a spam message I received in 2004:<\/p>\n\n\n\n<p style=\"font-size:0.6rem\">Received: from 137-34-50.adsl.terra.cl (200.50.34.137) by aristo.pacific.net.sg with<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SMTP; 29 Jun 2004 17:44:02 -0000<br>Received: from reservoirdroids.com (in2.another.com [216.65.64.233])<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; by 137-34-50.adsl.terra.cl (Postfix) with ESMTP id FF84EDEE6B for &lt;@pacific.net.sg&gt;;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Tue, 29 Jun 2004 10:18:13 -0700 Message-ID: 100101c45dfd$d82c4613$bba7b27b@reservoirdroids.com&gt;<br>From: &#8220;Ordeals S. Confers&#8221; &lt;antisemite@reservoirdroids.com&gt;<br>To: Subject: =?iso-8859-1?B?UmVwbHkuLg==?=<br>Date: Tue, 29 Jun 2004 10:18:13 -0700<\/p>\n\n\n\n<p>A year later, email providers upped their game and tried to detect spam. The headers in this 2005 email message contains additional information that the servers inserted to show that the message had been analyzed and [incorrectly] determined to be legitimate, and the spam was delivered unscathed. The battle between spammers and email providers had begun.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\" style=\"font-size:0.6rem\">Received: from psmtp.com (exprod5mx122.postini.com [64.18.0.36])\n    by clean.spiretech.com (8.11.6\/8.11.6) with SMTP id j1QELli14531\n    for &lt;tango@clean.spiretech.com>; Sat, 26 Feb 2005 06:21:47 -0800\nReceived: from source ([207.173.200.232]) by exprod5mx122.postini.com ([64.18.4.10]) with SMTP;\n    Sat, 26 Feb 2005 09:21:46 EST\nReceived: (from tango@localhost)\n    by atlas.spiretech.com (8.11.6\/8.11.6) id j1QELk114524\n    for tango@clean.spiretech.com; Sat, 26 Feb 2005 06:21:46 -0800\nReceived: from 88.bevivek.com (88.bevivek.com [66.63.188.88])\n    by atlas.spiretech.com (8.11.6\/8.11.6) with ESMTP id j1QELdL14446\n    for &lt;dave@inkdrop.net>; Sat, 26 Feb 2005 06:21:40 -0800\nFrom: Four Seasons&lt;Butler@bevivek.com>\nTo: dave@inkdrop.net\nSubject: [spam] 6 Complimentary Bottles of Fine Wine - Our Gift to You\nDate: 26 Feb 2005 09:20:55 -0500\nMessage-Id: &lt;92234857@ejgzmklY-zwqa>\nX-Envelope-To: dave@inkdrop.net\nX-pstn-levels:     (S: 0.00000\/ 8.90349 R:95.9108 P:95.9108 M:97.0232 C:60.3684 )\nX-pstn-settings: 5 (2.0000:4.0000) S gt3 gt2 gt1 r p m C\nX-pstn-addresses: from &lt;Butler@bevivek.com> forward (good recip) [2546\/120] \nStatus:   \nX-Text-Classification: spam\nX-POPFile-Link: http:\/\/127.0.0.1:8080\/jump_to_message?view=1959\nMIME-Version: 1.0\nContent-Type: multipart\/mixed;\n    boundary=\"--boundary-LibPST-iamunique-1069772051_-_-\"\n<\/pre>\n\n\n\n<p>It&#8217;s been a cat-and-mouse game ever since with no end in sight. Here are the headers from a message I received today from a spam message that got through the gauntlet of spam detecting servers:<\/p>\n\n\n\n<p><\/p>\n\n\n\n<pre class=\"wp-block-preformatted\" style=\"margin-top:0;margin-right:0;margin-bottom:0;margin-left:0;font-size:0.6em\">From - Thu Aug  1 09:08:15 2024<br>X-Account-Key: account16<br>X-UIDL: 1675109056.8937<br>X-Mozilla-Status: 0011<br>X-Mozilla-Status2: 00000000<br>X-Mozilla-Keys:                                                                                 <br>Return-Path: &lt;AniketVermaq@outlook.com&gt;<br>Received: from compute5.internal (compute5.nyi.internal [10.202.2.45])<br>     by slotwi21n26 (Cyrus 3.11.0-alpha0-669-gc35818610-fm-20240731.002-gc3581861) with LMTPA;<br>     Thu, 01 Aug 2024 00:08:47 -0400<br>X-Cyrus-Session-Id: slotwi21n26-1722485327-1117871-2-7764751912165447573<br>X-Sieve: CMU Sieve 3.0<br>X-Spam-known-sender: no<br>X-Spam-charsets: plain='iso-8859-1', html='iso-8859-1'<br>X-Resolved-to: dave@millermattson.com<br>X-Delivered-to: dave@millermattson.com<br>X-Mail-from: AniketVermaq@outlook.com<br>Received: from mx4 ([10.202.2.203])<br>  by compute5.internal (LMTPProxy); Thu, 01 Aug 2024 00:08:47 -0400<br>Received: from mx4.messagingengine.com (localhost [127.0.0.1])<br>    by mailmx.nyi.internal (Postfix) with ESMTP id 7B4806400A0<br>    for &lt;dave@millermattson.com&gt;; Thu,  1 Aug 2024 00:08:47 -0400 (EDT)<br>Received: from mailmx.nyi.internal (localhost [127.0.0.1])<br>    by mx4.messagingengine.com (Authentication Milter) with ESMTP<br>    id 4640F64C6A4.02ECF640095;<br>    Thu, 1 Aug 2024 00:08:47 -0400<br>ARC-Seal: i=2; a=rsa-sha256; cv=pass; d=messagingengine.com; s=fm3; t=<br>    1722485327; b=oTXK8IfYtpqf0Dicj1coRM\/J9KquYySJDVD0ClPO3VxSVebyz4<br>    Su+X7A40aUjw2+kGqJ6uuw3F027Jf\/LLlU8rBLsfyOw0Knte63R6BLTkXVesViUr<br>    GdxFY+rBrmBTOrhfTvvIJY\/3y4\/ONwIvNAZyNIWYMHfYo1BnioIEGiPGhmwhJB64<br>    HrNbzioQJvoPvqeM+kqar4\/oC\/gZ7WXFBaJ3cYFJmCRx9fsrXFLGWQqcsb0xUtfX<br>    evM8PSdi22VYjF3syBJWmm2hSrg3zSm00souLi9XaUO\/3HZa58P5fowUuFfZf+81<br>    W+zwpsO93KojkFa\/oFypKHlt5ER8hGj7PoUw==<br>ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed\/relaxed; d=<br>    messagingengine.com; h=from:subject:date:message-id:references<br>    :in-reply-to:content-type:mime-version; s=fm3; t=1722485327; bh=<br>    OmE939tcMRWeaQNiB6cWYl6xewhj\/BK1x54m9mlJY4k=; b=t7I7xmRDY\/a\/2bsm<br>    dLXBMa7X\/H6FVYuRqt8cOTxIZrxXmer3FaS2jjwaktmlK8TXahgDr8BBY88gMGAB<br>    QGlFJfva0i9gxhyqtt56jw\/5ZB+J1x5MOjRNxBppP+ng6AOOViILZpHCM7KdyPVu<br>    7hXOEC+doK54hwkSAEgaCNG2W9uJSniAfoLLq9i7shygMI+wx5ISd622kIs5k9\/U<br>    vDYWqP4acgNLzYGJpMcMjOLcvCIsBCYsJs6VLGwMSoIc4Jz7sIx41Qjph4Ntxj9U<br>    yoQRRUqG+1cQ38wNbZj30lAIhOoxy4jp4o9uMdi5zUaqbqS4sMGQY6FMTtKhPt4Z<br>    7ohOPw==<br>ARC-Authentication-Results: i=2; mx4.messagingengine.com;<br>    x-csa=none;<br>    x-me-sender=none;<br>    x-ptr=fail smtp.helo=EUR02-VI1-obe.outbound.protection.outlook.com<br>    policy.ptr=mail-vi1eur02olkn2094.outbound.protection.outlook.com;<br>    bimi=skipped (DMARC Policy is not at enforcement);<br>    arc=pass (as.1.microsoft.com=pass, ams.1.microsoft.com=pass)<br>    smtp.remote-ip=40.92.48.94;<br>    dkim=pass (2048-bit rsa key sha256) header.d=outlook.com<br>    header.i=@outlook.com header.b=LtMVS31S header.a=rsa-sha256<br>    header.s=selector1;<br>    dmarc=pass policy.published-domain-policy=none<br>    policy.published-subdomain-policy=quarantine<br>    policy.applied-disposition=none policy.evaluated-disposition=none<br>    (p=none,sp=quarantine,d=none,d.eval=none) policy.policy-from=p<br>    header.from=outlook.com;<br>    iprev=pass smtp.remote-ip=40.92.48.94<br>    (mail-vi1eur02olkn2094.outbound.protection.outlook.com);<br>    spf=pass smtp.mailfrom=AniketVermaq@outlook.com<br>    smtp.helo=EUR02-VI1-obe.outbound.protection.outlook.com<br>X-ME-Authentication-Results: mx4.messagingengine.com;<br>    x-aligned-from=pass (Address match);<br>    x-return-mx=pass header.domain=outlook.com policy.is_org=yes<br>      (MX Records found: outlook-com.olc.protection.outlook.com);<br>    x-return-mx=pass smtp.domain=outlook.com policy.is_org=yes<br>      (MX Records found: outlook-com.olc.protection.outlook.com);<br>    x-tls=pass smtp.version=TLSv1.2 smtp.cipher=ECDHE-RSA-AES256-GCM-SHA384<br>      smtp.bits=256\/256;<br>    x-vs=clean score=30 state=0<br>Authentication-Results: mx4.messagingengine.com;<br>    x-csa=none;<br>    x-me-sender=none;<br>    x-ptr=fail smtp.helo=EUR02-VI1-obe.outbound.protection.outlook.com<br>      policy.ptr=mail-vi1eur02olkn2094.outbound.protection.outlook.com<br>Authentication-Results: mx4.messagingengine.com;<br>    bimi=skipped (DMARC Policy is not at enforcement)<br>Authentication-Results: mx4.messagingengine.com;<br>    arc=pass (as.1.microsoft.com=pass, ams.1.microsoft.com=pass)<br>      smtp.remote-ip=40.92.48.94<br>Authentication-Results: mx4.messagingengine.com;<br>    dkim=pass (2048-bit rsa key sha256) header.d=outlook.com<br>      header.i=@outlook.com header.b=LtMVS31S header.a=rsa-sha256<br>      header.s=selector1;<br>    dmarc=pass policy.published-domain-policy=none<br>      policy.published-subdomain-policy=quarantine<br>      policy.applied-disposition=none policy.evaluated-disposition=none<br>      (p=none,sp=quarantine,d=none,d.eval=none) policy.policy-from=p<br>      header.from=outlook.com;<br>    iprev=pass smtp.remote-ip=40.92.48.94<br>      (mail-vi1eur02olkn2094.outbound.protection.outlook.com);<br>    spf=pass smtp.mailfrom=AniketVermaq@outlook.com<br>      smtp.helo=EUR02-VI1-obe.outbound.protection.outlook.com<br>X-ME-VSCause: gggruggvucftvghtrhhoucdtuddrgeeftddrjeejgdekudcutefuodetggdotefrodftvf<br>    curfhrohhfihhlvgemucfhrghsthforghilhdpggftfghnshhusghstghrihgsvgdpuffr<br>    tefokffrpgfnqfghnecuuegrihhlohhuthemuceftddtnecumhhishhsihhnghcuvffquc<br>    hfihgvlhguucdlfedtmdenucfjughrpefhufhtfffkfhgjtgggsegrtddtredttddunecu<br>    hfhrohhmpeetnhhikhgvthcugggvrhhmrgcuoeetnhhikhgvthggvghrmhgrqhesohhuth<br>    hlohhokhdrtghomheqnecuggftrfgrthhtvghrnhepjedvtdfhgfeigeehfefgkeeukeet<br>    uddvhfeftefgkefhgfeftdevheehgfeftdeknecukfhppeegtddrledvrdegkedrleegpd<br>    dviedtfeemuddtrgeimedutddvmedvjeehmeemudeknecuvehluhhsthgvrhfuihiivgep<br>    tdenucfrrghrrghmpehinhgvthepgedtrdelvddrgeekrdelgedphhgvlhhopefgfgfttd<br>    dvqdggkfduqdhosggvrdhouhhtsghouhhnugdrphhrohhtvggtthhiohhnrdhouhhtlhho<br>    ohhkrdgtohhmpdhmrghilhhfrhhomhepoeetnhhikhgvthggvghrmhgrqhesohhuthhloh<br>    hokhdrtghomheqpdhnsggprhgtphhtthhopedupdhrtghpthhtohepoegurghvvgesmhhi<br>    lhhlvghrmhgrthhtshhonhdrtghomheq<br>X-ME-VSScore: 30<br>X-ME-VSCategory: clean<br>X-ME-CSA: none<br>X-ME-Received: &lt;xmx:TwqrZkUevpagGcE8VpannB90n9_UOYHUHg0Yk1jviyHCYhJ0HbSxxQ&gt;<br>Received-SPF: pass<br>    (outlook.com: Sender is authorized to use 'AniketVermaq@outlook.com' in 'mfrom' identity (mechanism 'include:spf.protection.outlook.com' matched))<br>    receiver=mx4.messagingengine.com;<br>    identity=mailfrom;<br>    envelope-from=\"AniketVermaq@outlook.com\";<br>    helo=EUR02-VI1-obe.outbound.protection.outlook.com;<br>    client-ip=40.92.48.94<br>Received: from EUR02-VI1-obe.outbound.protection.outlook.com (mail-vi1eur02olkn2094.outbound.protection.outlook.com [40.92.48.94])<br>    (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256\/256 bits))<br>    (No client certificate requested)<br>    by mx4.messagingengine.com (Postfix) with ESMTPS id 02ECF640095<br>    for &lt;dave@millermattson.com&gt;; Thu,  1 Aug 2024 00:08:46 -0400 (EDT)<br>ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none;<br> b=IPI5v1P4\/n9x0RX6pz7eAc8ixlZkjAaUTIi1iUo+xFdZLjw6Sm2+QB3J0af1LZnyHdztYruKLYAeLco0KxI\/4HBznJ7ECjL++m2McgEZDG0gTwo+xygBXb6F4vWNR1eff3PkQ1fT4QVqwjEOwwsE9ise\/6dfs7kCif9QDTv7dAlsz5pv2\/eUDikJbfNy7003mw82zG7352W8ti0bnEsAcJwUrtZcyYiL5eCl+AQUA4k69RB8NHxG+eYCkSuUXsOOF\/n\/vd5tm4FvAqucSAaFXw2bqFqssxyJrUcRlVdkPeV23BmUUDghwmXbNZ7iWhvUf5dohhM24F\/PfBQJ9eVYcQ==<br>ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed\/relaxed; d=microsoft.com;<br> s=arcselector10001;<br> h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1;<br> bh=OmE939tcMRWeaQNiB6cWYl6xewhj\/BK1x54m9mlJY4k=;<br> b=HjntiON6MD0CsIjBB7Gc11+1vtT\/pwFgZLtVK2x1mSLlHyQTvst6nW4jWtGp+bFLg1oMe9hwISgxdMNTI5wcKGZwJG4NjiKTnwjB\/Rk2s8\/Uzexd4Uc3yrC6\/NPm0yrri3VVoX8huLxESj1C7bGTyvjarHcyFHPuidl9sj3sYAWRsMr0YRxnXWj4j8GSMHbaF7pzPTwHXEuCL\/sZ4wjtUhtvVjRJ0iKTD7B+ietR9divzUjmC7lT9gi3LW7ug8Q0z+Utznvtg1ZwMWIONzcEtKwKV29hDg7dquhVd9pKrkTFgh1V342nYICjGWRI+u4TnTJb\/cNoyTyl1WaoQaGgbQ==<br>ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=none; dmarc=none;<br> dkim=none; arc=none<br>DKIM-Signature: v=1; a=rsa-sha256; c=relaxed\/relaxed; d=outlook.com;<br> s=selector1;<br> h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;<br> bh=OmE939tcMRWeaQNiB6cWYl6xewhj\/BK1x54m9mlJY4k=;<br> b=LtMVS31SKEtyr6Hsl3n1VYqrDtYRVJZM65Cv0rdqcitAkh6C5OXDjtP0\/FXje6O8AoaZ1Mia69o0A4IT5W+f6Uvl4BPYT1TZw48sZp\/N3Uidd334igUCkZ27h175n3AjpAoJ5QOCLdXX3iY80a3Yre8Vc6VcozB+cAMYzT1xlVLzkWe6iAq3y4kOFMmb9DZoR6dWQKy9kQK44y5KQppBew19ImJsAVC98iAAkNq0r3gIPKaZSAMu9IEwpZWfNl9MwE+CwYgp3vIeiet41uGZDxGH0CVuHDVya6KPrs7VsbUzl66463WZcN3c660CSZIkOlf7HE8fLjTkx7s27bGcSA==<br>Received: from PAXP250MB0676.EURP250.PROD.OUTLOOK.COM (2603:10a6:102:275::18)<br> by DB9P250MB0545.EURP250.PROD.OUTLOOK.COM (2603:10a6:10:339::22) with<br> Microsoft SMTP Server (version=TLS1_2,<br> cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7828.21; Thu, 1 Aug<br> 2024 04:08:30 +0000<br>Received: from PAXP250MB0676.EURP250.PROD.OUTLOOK.COM<br> ([fe80::7811:295f:3d4e:cc87]) by PAXP250MB0676.EURP250.PROD.OUTLOOK.COM<br> ([fe80::7811:295f:3d4e:cc87%7]) with mapi id 15.20.7828.016; Thu, 1 Aug 2024<br> 04:08:30 +0000<br>From: Aniket Verma &lt;AniketVermaq@outlook.com&gt;<br>Subject: Re: Permission,<br>Thread-Topic: Permission,<br>Thread-Index: AQHayEV7zDCNCqY2b0C9A+iuZIR0rbISXDEh<br>Date: Thu, 1 Aug 2024 04:08:29 +0000<br>Message-ID:<br> &lt;PAXP250MB06768C3B643DBD690AC8461BDCB22@PAXP250MB0676.EURP250.PROD.OUTLOOK.COM&gt;<br>References:<br> &lt;PAXP250MB06763BD953AD6EF14F0BC30CDCD72@PAXP250MB0676.EURP250.PROD.OUTLOOK.COM&gt;<br>In-Reply-To:<br> &lt;PAXP250MB06763BD953AD6EF14F0BC30CDCD72@PAXP250MB0676.EURP250.PROD.OUTLOOK.COM&gt;<br>Accept-Language: en-US<br>Content-Language: en-US<br>X-MS-Has-Attach:<br>X-MS-TNEF-Correlator:<br>msip_labels:<br>x-tmn:<br> [MYynBzrhyJ9h6DycNBls81j7kB63Qtb+spoXWzvgv81bSqt0N5FY9546Tfl\/0otHiuT5oCiRhyc=]<br>x-ms-publictraffictype: Email<br>x-ms-traffictypediagnostic: PAXP250MB0676:EE_|DB9P250MB0545:EE_<br>x-ms-office365-filtering-correlation-id: 9ce6a83f-8cd6-4d0a-8364-08dcb1df99d7<br>x-microsoft-antispam:<br> BCL:0;ARA:14566002|8060799006|461199028|19110799003|15030799003|102099032|440099028|3412199025;<br>x-microsoft-antispam-message-info:<br> 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Occasional spam was not yet a big deal. 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