Date: Mon, 11 Nov 2019 17:04:10 +0100
From: spammer@example.com
To: victim@example.com
Subject: good csv
Message-ID: <20191111160410.GH97706@example.com>
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="ZLmNAHp9yJE7SW8z"
Content-Disposition: inline
--ZLmNAHp9yJE7SW8z
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
--ZLmNAHp9yJE7SW8z
Content-Type: text/plain; charset=utf-8
Content-Disposition: attachment; filename="good.csv"
"A","B",,,,"",,
--ZLmNAHp9yJE7SW8z--