Return-Path: sender@domain.tld From: Ye Olde Sender To: my list Message-ID: <4$@domain.tld> Date: Tue, 21 Jan 2020 17:23:53 +0100 MIME-Version: 1.0 Subject: A nice subject Content-type: multipart/alternative;boundary="________boundary-level1" This is a multi-part that should be "mixed" but that Apple mail made "alternative". --________boundary-level1 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=iso-8859-1 This a text/plain part, first member of the alternative --________boundary-level1 Content-Type: multipart/mixed; boundary="________boundary-level2" --________boundary-level2 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii An HTML part inside the multipart/mixed, second part of the alternative. --________boundary-level2 Content-Type: application/pdf; name="globuz.pdf" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="globuz.pdf" ThisisaPDFattachement --________boundary-level2-- --________boundary-level1--