ISTR that we do it the way we do because we didn’t want to do an, “Off The Box Call” even to look up the rDNS. Would love to see us go back to the previously-noted format, but I doubt that’s going to happen.
And there are so many other formats out there. Aloha, Michael. -- Michael J Wise Microsoft Corporation| Spam Analysis "Your Spam Specimen Has Been Processed." Got the Junk Mail Reporting Tool<http://www.microsoft.com/en-us/download/details.aspx?id=18275> ? From: Erwin <joc...@gmail.com> Sent: Wednesday, April 18, 2018 3:58 PM To: Michael Wise <michael.w...@microsoft.com> Cc: mailop <mailop@mailop.org> Subject: Re: [mailop] Received header address information Section 4.1.2 defines address-literal: address-literal = "[" IPv4-address-literal / IPv6-address-literal / General-address-literal "]" ; See section 4.1.3 Section 4.1.3 provides specifics for IPv4 (and IPv6 as Brandon kind of hinted): IPv4-address-literal = Snum 3("." Snum) IPv6-address-literal = "IPv6:" IPv6-addr And then section 4.4 talks about the Received header itself (I won't quote all the relevant bits here out of that). To respond to Steve, I am all about being flexible in the parsing, but (a) want to make sure I wasn't misreading the specs here and (b) figured it never hurts to bring it up and see if something can be improved to make life easier for myself and others going forward. I'm wondering how widespread this different format is, meaning how many Received headers might be getting ignored because they didn't fit the patterns. Thanks, Erwin On Wed, Apr 18, 2018 at 3:03 PM, Michael Wise via mailop <mailop@mailop.org<mailto:mailop@mailop.org>> wrote: Sorry, what section of 2821? With all the different styles of Received: headers out there (Qmail comes to mind…), I wasn’t aware that there was in fact a single standard on the format. I mean, I really love the (xxxx [n.n.n.n]) structure and all, but … If you could point me to a MUST reference, I’d be grateful. Aloha, Michael. -- Michael J Wise Microsoft Corporation| Spam Analysis "Your Spam Specimen Has Been Processed." Got the Junk Mail Reporting Tool<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.microsoft.com%2Fen-us%2Fdownload%2Fdetails.aspx%3Fid%3D18275&data=02%7C01%7CMichael.Wise%40microsoft.com%7Cb6602f4070264579d54808d5a57fc502%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636596890548130307&sdata=3jDyWDOwn3klEQqfOSm%2BI6h8InYeF8HnlRCZSiY4EpI%3D&reserved=0> ? From: mailop <mailop-boun...@mailop.org<mailto:mailop-boun...@mailop.org>> On Behalf Of Erwin Sent: Wednesday, April 18, 2018 2:41 PM To: mailop <mailop@mailop.org<mailto:mailop@mailop.org>> Subject: [mailop] Received header address information Hi, This may be old hat to some, but staring at the RFCs (specifically 2821) the only conclusion I see is that Microsoft is (or at least *.outlook.com<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Foutlook.com&data=02%7C01%7Cmichael.wise%40microsoft.com%7C82c6a24e30414114a25508d5a5765c7b%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636596850158074661&sdata=UT6h9frOHbZ76bjwYqCtsS704%2B7hfWyw269vgWCHQmU%3D&reserved=0> servers are) violating the format of the Received headers here: Received: from mta.email.thinkgeek.com<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmta.email.thinkgeek.com&data=02%7C01%7Cmichael.wise%40microsoft.com%7C82c6a24e30414114a25508d5a5765c7b%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636596850158084665&sdata=3rTpbpv612yzA%2FwJp57jlbECMZxpc3GSX9ayn1I%2FxBU%3D&reserved=0> (66.231.88.32) by SN1NAM04FT019.mail.protection.outlook.com<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2FSN1NAM04FT019.mail.protection.outlook.com&data=02%7C01%7Cmichael.wise%40microsoft.com%7C82c6a24e30414114a25508d5a5765c7b%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636596850158084665&sdata=MKriM7d6Wfg6pvQhxU29pkOpz1OqjqaozU5GZwan7qE%3D&reserved=0> (10.152.88.152) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA_P384) id 15.20.675.14 via Frontend Transport; Mon, 16 Apr 2018 16:33:42 +0000 Should that IPv4 literal be enclosed with "[" and "]" tokens, either as ([a.b.c.d]) or (hostname [a.b.c.d])? Thanks in advance, Erwin _______________________________________________ mailop mailing list mailop@mailop.org<mailto:mailop@mailop.org> https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop<https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fchilli.nosignal.org%2Fcgi-bin%2Fmailman%2Flistinfo%2Fmailop&data=02%7C01%7CMichael.Wise%40microsoft.com%7Cb6602f4070264579d54808d5a57fc502%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C1%7C636596890548150329&sdata=jQIM9BJkrqKB5iHIxWWHoQdFQ9M4TwKkLJrJdCxauvs%3D&reserved=0>
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