Another one I've seen is an extra newline which ends the headers, ie: Subject: foo To: b...@example.net
From: campa...@example.org I don't recall how annoying our parser is, whether something like this would also cause early end of headers: Subject: foo To: bar@ example.net From: campa...@example.org Brandon On Tue, Nov 8, 2022 at 2:15 PM Mary via mailop <mailop@mailop.org> wrote: > > I've seen this before, when the header above the From header is broken: > > Authentication-Results: server; > dkim=blah reason="blah"; > From: "Valid" <addr...@example.tld> > To: mailop <mailop@mailop.org> > > > The parser thinks that the From: header is part of the previous header, > thus ignoring it and ending with a missing header error. > > > > On Tue, 8 Nov 2022 13:41:57 -0800 John Stephenson via mailop < > mailop@mailop.org> wrote: > > > We've seen the below failure for two different clients (each in one > > specific campaign) which resulted in lots of these failures at Gmail for > > those respective campaigns. Our Support/Ops team continue to insist that > > we sent these campaigns with the same exact from address/header/domain > set > > up as all of the other campaigns launched on this day and that the issue > > must be on Gmail's side. > > I'm praying that somebody here has had experience with this failure and > > tracked down some subtle/quirky reason why an otherwise reliable sending > > MTA would encounter this failure? > > > > Best, > > > > John > > > > > > 550-5.7.1 [142.54.247.27] Our system has detected that this message is > not > > RFC\r\n550-5.7.1 5322 compliant:\r\n550-5.7.1 'From' header is > > missing.\r\n550-5.7.1 To reduce the amount of spam sent to Gmail, this > > message has been\r\n550-5.7.1 blocked. Please visit\r\n550-5.7.1 > > https://support.google.com/mail/?p=RfcMessageNonCompliant\r\n550 5.7.1 > and > > review RFC 5322 specifications for more information. > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://list.mailop.org/listinfo/mailop >
_______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
