Avoid creating a multipart/mixed with just 1 child.

Fixes issue #441
jstedfast · Oct 11, 2018 · 2ed6491 · 2ed6491
1 parent 275fa75
commit 2ed6491
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/MimeKit/BodyBuilder.cs b/MimeKit/BodyBuilder.cs
@@ -166,6 +166,9 @@ public MimeEntity ToMessageBody ()
 			}
 
 			if (Attachments.Count > 0) {
+				if (body == null && Attachments.Count == 1)
+					return Attachments[0];
+
 				var mixed = new Multipart ("mixed");
 
 				if (body != null)