Add example of email header to use when sending email from thirdparty

card

dev/mail/source_email_from_thirdparty.txt

@@ -0,0 +1,48 @@
+Content-Type: multipart/mixed; boundary="===============4543832834454763172=="
+Date: Thu, 12 Nov 2015 17:58:00 -0000
+From: Administrator <admin@yourcompany.example.com>
+MIME-Version: 1.0
+Message-ID: 5nLkUQEIn50FnlwxWDkh59NfLof1ode0uC5cZEgm9Y4=@mailhog.example
+Message-Id: <1447351080.369951963424683.576889035053436-dolibarr-7-thirdparty@PCHOME-LD>
+Received: from pchome-ld by mailhog.example (Go-MailHog)
+          id 5nLkUQEIn50FnlwxWDkh59NfLof1ode0uC5cZEgm9Y4=@mailhog.example; Thu, 12 Nov 2015 18:58:00 +0100
+Reply-To: Administrator <admin@yourcompany.example.com>
+Return-Path: <admin@yourcompany.example.com>
+Subject: A test email from thirdparty card
+To: Thirdparty company <thirdpartycompany@yourcompany.example.com>
+
+--===============4543832834454763172==
+Content-Type: multipart/alternative;
+ boundary="===============8764907306434163361=="
+MIME-Version: 1.0
+
+--===============8764907306434163361==
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: base64
+
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+
+--===============8764907306434163361==
+Content-Type: text/html; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: base64
+
+PHA+dGVzdDI8L3A+Cgo8c3Bhbj4tLTxicj4KQWRtaW5pc3RyYXRvcjwvc3Bhbj4KCjxiciAvPjxz
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+
+--===============8764907306434163361==--
+
+--===============4543832834454763172==--