ZacharyZhang-NYandClaude Opus 5.5
fe90221c11
The reader walks the MIME tree with its container context: alternative picks versions, related finds its root by start, attached multiparts stay whole, digest children are messages. Nesting deeper than 64 levels, counting enclosed messages, is refused, and over-deep parse results are taken apart iteratively so dropping them cannot overflow the stack. Composite parts with a Content-ID are cid targets. The writer keeps attachment parameters and Content-IDs, writes multipart and message attachments unencoded, and makes its own Message-ID. SMTP adds BODY=8BITMIME for 8-bit bodies and SMTPUTF8 when any header block at any depth is 8-bit. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
45 lines
1.0 KiB
Plaintext
45 lines
1.0 KiB
Plaintext
Return-Path: <zhang@example.com>
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X-Custom: kept as sent
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From: =?UTF-8?B?5byg5LiJ?= <zhang@example.com>
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To: Bo Smith <bo@example.com>, cy@example.org
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Cc: Team: dee@example.net;
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Subject: =?UTF-8?Q?Caf=C3=A9_report?=
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Date: Mon, 19 Oct 2026 08:30:00 +0200
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Message-ID: <m1@example.com>
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In-Reply-To: <m0@example.com>
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References: <r1@example.com> <m0@example.com>
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MIME-Version: 1.0
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Content-Type: multipart/mixed; boundary="mix"
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--mix
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Content-Type: multipart/related; boundary="rel"
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--rel
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Content-Type: multipart/alternative; boundary="alt"
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--alt
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Content-Type: text/plain; charset=utf-8
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Content-Transfer-Encoding: quoted-printable
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Caf=C3=A9 numbers attached.
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--alt
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Content-Type: text/html; charset=utf-8
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<p>Café <img src="cid:logo@example.com"></p>
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--alt--
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--rel
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Content-Type: image/png
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Content-ID: <logo@example.com>
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Content-Transfer-Encoding: base64
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iVBORw0KGgo=
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--rel--
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--mix
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Content-Type: application/pdf; name="report.pdf"
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Content-Disposition: attachment; filename="report.pdf"
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Content-ID: <att@example.com>
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Content-Transfer-Encoding: base64
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JVBERi0xLjQK
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--mix--
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