From 408ffb13ea5de88e96b1e115a258125e5d4e1563 Mon Sep 17 00:00:00 2001
From: Jacek Piszczek <jacadcaps@runbox.com>
Date: Mon, 15 Mar 2021 20:31:07 -0400
Subject: [PATCH] Default missing Content-Type to Text/Plain as per
 https://tools.ietf.org/html/rfc2045#section-5.2

---
 src/vmime/messageParser.cpp | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/vmime/messageParser.cpp b/src/vmime/messageParser.cpp
index 21ac09bb..b46d3237 100644
--- a/src/vmime/messageParser.cpp
+++ b/src/vmime/messageParser.cpp
@@ -204,7 +204,16 @@ bool messageParser::findSubTextParts(
 
 		} else {
 
-			// No "Content-type" field.
+			// No "Content-type" field. RFC2045 section 5.2 assumes this is TEXT/PLAIN
+			try {
+				shared_ptr <textPart> txtPart = textPartFactory::getInstance()->create(mediaType(mediaTypes::TEXT, mediaTypes::TEXT_PLAIN));
+				txtPart->parse(msg, part, p);
+
+				m_textParts.push_back(txtPart);
+			}
+			catch (exceptions::no_factory_available& e) {
+				// Content-type not recognized.
+			}
 		}
 	}