RFC 5321 4.4 ie "Extended-Domain" is how they're supposed to be shown. The IP is an address-literal which is supposed to be in brackets ([]), which to be fair, I don't think we do the right thing with ipv6 (which is supposed to have a prefix on the ip, ie [IPv6:2001:41c8:51:83:feff:ff:fe00:a0b])
Brandon On Wed, Apr 18, 2018 at 3:11 PM Michael Wise via mailop <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 > <http://www.microsoft.com/en-us/download/details.aspx?id=18275> ? > > > > *From:* mailop <mailop-boun...@mailop.org> *On Behalf Of *Erwin > *Sent:* Wednesday, April 18, 2018 2:41 PM > *To:* mailop <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 > https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop >
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