To: test@example.com From: test@example.com Subject: Test message with attached message Message-ID: <8259dd8e-2293-8765-e720-61dfcd10a6f3@example.com> Date: Sat, 30 Dec 2017 19:12:38 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:59.0) Gecko/20100101 Thunderbird/59.0a1 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="------------9B410E80D6DA0868F068B0E4" Content-Language: en-GB This is a multi-part message in MIME format. --------------9B410E80D6DA0868F068B0E4 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit This is a test message with an attached message. --------------9B410E80D6DA0868F068B0E4 Content-Type: message/rfc822; name="attached-message.eml" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="attached-message.eml" To: test@example.com From: test@example.com Subject: Attached message (plaintext + HMTL) Message-ID: Date: Sat, 30 Dec 2017 19:31:21 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:59.0) Gecko/20100101 Thunderbird/59.0a1 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="------------FAB286B8794CC63C0A0FD1BB" Content-Language: de-DE This is a multi-part message in MIME format. --------------FAB286B8794CC63C0A0FD1BB Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Here is the body of the attached message. Search for bodyOfAttachedMessagePläin. --------------FAB286B8794CC63C0A0FD1BB Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit Here is the body of the attached message. Search for bodyOfAttachedMessageHTML. --------------FAB286B8794CC63C0A0FD1BB-- --------------9B410E80D6DA0868F068B0E4--