The major change here is switching to line based rather than character based extraction from the destination message to recreate the source message.
I have updated some of my examples; e.g. the message that I was testing against for the previous one now looks like this: Original: DKIM2: i=1; ... MIME-Version: 1.0 Message-Id: <[email protected]> Date: Thu, 21 Mar 2024 12:09:37 +1000 From: "Bron Gondwana" <[email protected]> To: [email protected] Subject: Working group last call draft-ietf-jmap-webpush-vapid Content-Type: multipart/alternative; boundary=12b53dc829d24511bfa04f7d5e3675f8 --12b53dc829d24511bfa04f7d5e3675f8 Content-Type: text/plain Hi All, This email starts a working group last call for https://datatracker.ietf.org/doc/draft-ietf-jmap-webpush-vapid/ as discussed in the IETF119 session. Please post any comments or responses by *Thursday, April 4th, 2024*. Thanks, Bron. -- Bron Gondwana, CEO, Fastmail Pty Ltd [email protected] --12b53dc829d24511bfa04f7d5e3675f8 Content-Type: text/html Content-Transfer-Encoding: quoted-printable <!DOCTYPE html><html><head><title></title><style type=3D"text/css">p.Mso= Normal,p.MsoNoSpacing{margin:0}</style></head><body><div style=3D"font-f= amily:Arial;">Hi All,<br></div><div style=3D"font-family:Arial;"><div><b= r></div><div>This email starts a working group last call for <a href=3D"= https://datatracker.ietf.org/doc/draft-ietf-jmap-webpush-vapid/";>https:/= /datatracker.ietf.org/doc/draft-ietf-jmap-webpush-vapid/</a> as discusse= d in the IETF119 session.<br></div><div style=3D"font-family:Arial;"><br= ></div><div style=3D"font-family:Arial;">Please post any comments or res= ponses by <b>Thursday, April 4th, 2024</b>.<br></div><div style=3D"font-= family:Arial;"><br></div><div style=3D"font-family:Arial;">Thanks,<br></= div><div style=3D"font-family:Arial;"><br></div><div style=3D"font-famil= y:Arial;">Bron.<br></div><div><br></div><div><br></div></div><div id=3D"= sig56629417"><div class=3D"signature">--<br></div><div class=3D"signatur= e"> Bron Gondwana, CEO, Fastmail Pty Ltd<br></div><div class=3D"si= gnature"> [email protected]<br></div><div class=3D"signature"= ><br></div></div><div style=3D"font-family:Arial;"><br></div></body></ht= ml> --12b53dc829d24511bfa04f7d5e3675f8-- And the mailing list copy like this (NOTE: I'm using a DKIM1 signer hence the duplicated `h=` fields. DKIM2: i=2; v=2; a=rsa-sha256; c=relaxed; d=example.com; h=cc :content-type:content-type:date:date:dkim2:dkim2:dkim2-diff-body :dkim2-diff-header:from:from:in-reply-to:message-id:mime-version :reply-to:sender:sender:subject:subject:to:to; s=dkim2selector; bh=+UCZHtMZyytbykMD6d7ParYHcts6KYUonxc+lHi99AI=; b=iunaXi6iqbtB fNPGpnblgdEnnVLR+obl98o5hAwScwjp2gF8EVUcMtLcF53mW/btT8k2T1ryByv9 WPtmuiVy5lfhmUXr9lHAiS48ppwDAPXiBKOCSKSXBYwxl2yM3CadWD9CY975v0/c YWvK+oczLB1sI0ctgNky6YI6Uk8XkPI= *DKIM2-Delta-Body: i=2; c=4-44* DKIM2-Delta-Header: i=2; b=Content-Type,bXVsdGlwYXJ0L2FsdGVybmF0aXZlOyBib3VuZGFyeT0xMmI1M2RjODI5ZDI0NTExYmZhMDRmN2Q1ZTM2NzVmOA==; b=From,IkJyb24gR29uZHdhbmEiIDxicm9uZ0BmYXN0bWFpbHRlYW0uY29tPg==; t=Sender; t=Subject,Working group last call draft-ietf-jmap-webpush-vapid DKIM2: i=1; ... MIME-Version: 1.0 Message-Id: <[email protected]> Date: Thu, 21 Mar 2024 12:09:37 +1000 To: [email protected] Subject: [Jmap] Working group last call draft-ietf-jmap-webpush-vapid Content-Type: multipart/mixed; boundary="===============5385250436117681394==" Errors-To: [email protected] Sender: "Jmap" <[email protected]> From: Bron Gondwana <[email protected]> --===============5385250436117681394== Content-Type: multipart/alternative; boundary=12b53dc829d24511bfa04f7d5e3675f8 --12b53dc829d24511bfa04f7d5e3675f8 Content-Type: text/plain Hi All, This email starts a working group last call for https://datatracker.ietf.org/doc/draft-ietf-jmap-webpush-vapid/ as discussed in the IETF119 session. Please post any comments or responses by *Thursday, April 4th, 2024*. Thanks, Bron. -- Bron Gondwana, CEO, Fastmail Pty Ltd [email protected] --12b53dc829d24511bfa04f7d5e3675f8 Content-Type: text/html Content-Transfer-Encoding: quoted-printable <!DOCTYPE html><html><head><title></title><style type=3D"text/css">p.Mso= Normal,p.MsoNoSpacing{margin:0}</style></head><body><div style=3D"font-f= amily:Arial;">Hi All,<br></div><div style=3D"font-family:Arial;"><div><b= r></div><div>This email starts a working group last call for <a href=3D"= https://datatracker.ietf.org/doc/draft-ietf-jmap-webpush-vapid/";>https:/= /datatracker.ietf.org/doc/draft-ietf-jmap-webpush-vapid/</a> as discusse= d in the IETF119 session.<br></div><div style=3D"font-family:Arial;"><br= ></div><div style=3D"font-family:Arial;">Please post any comments or res= ponses by <b>Thursday, April 4th, 2024</b>.<br></div><div style=3D"font-= family:Arial;"><br></div><div style=3D"font-family:Arial;">Thanks,<br></= div><div style=3D"font-family:Arial;"><br></div><div style=3D"font-famil= y:Arial;">Bron.<br></div><div><br></div><div><br></div></div><div id=3D"= sig56629417"><div class=3D"signature">--<br></div><div class=3D"signatur= e"> Bron Gondwana, CEO, Fastmail Pty Ltd<br></div><div class=3D"si= gnature"> [email protected]<br></div><div class=3D"signature"= ><br></div></div><div style=3D"font-family:Arial;"><br></div></body></ht= ml> --12b53dc829d24511bfa04f7d5e3675f8-- --===============5385250436117681394== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Jmap mailing list [email protected] https://www.ietf.org/mailman/listinfo/jmap --===============5385250436117681394==-- So it's just keeping lines 4-44 from the message, removing the MIME wrapper and trailing signature to recreate the original message. Bron. On Wed, Jun 18, 2025, at 17:09, [email protected] wrote: > A new version of Internet-Draft > draft-gondwana-dkim2-modification-alegbra-02.txt has been successfully > submitted by Bron Gondwana and posted to the > IETF repository. > > Name: draft-gondwana-dkim2-modification-alegbra > Revision: 02 > Title: A method for describing changes made to an email > Date: 2025-06-18 > Group: dkim > Pages: 6 > URL: > https://www.ietf.org/archive/id/draft-gondwana-dkim2-modification-alegbra-02.txt > Status: > https://datatracker.ietf.org/doc/draft-gondwana-dkim2-modification-alegbra/ > HTMLized: > https://datatracker.ietf.org/doc/html/draft-gondwana-dkim2-modification-alegbra > Diff: > https://author-tools.ietf.org/iddiff?url2=draft-gondwana-dkim2-modification-alegbra-02 > > Abstract: > > This memo describes a method for describing the changes made to an > email during common email modifications, for example those caused by > mailing lists and forwarders. > > While this is general enough to be used for any changes, it is > anticipated that this method will normally be used for removing added > data rather than large complex changes. > > > > The IETF Secretariat > > > -- Bron Gondwana, CEO, Fastmail Pty Ltd [email protected]
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