From: Alice Sender <alice@example.org>
To: hello@example.test
Cc: bob@example.net
Subject: WmailHub 端到端测试邮件
Message-ID: <test-001@example.org>
Date: Wed, 30 Sep 2026 03:20:00 +0000
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="BOUNDARY-XYZ"

--BOUNDARY-XYZ
Content-Type: text/plain; charset=utf-8

Hello WmailHub! This is a plain text body.
--BOUNDARY-XYZ
Content-Type: text/html; charset=utf-8

<html><body><h1>Hello WmailHub</h1><p>This is <b>HTML</b> body.</p></body></html>
--BOUNDARY-XYZ
Content-Type: text/plain; charset=utf-8; name="notes.txt"
Content-Disposition: attachment; filename="notes.txt"
Content-Transfer-Encoding: base64

VGhpcyBpcyBhbiBhdHRhY2htZW50IGZpbGUu
--BOUNDARY-XYZ--