From 180c6699e0f9d0db1e68d7f7a9b4f5a12a1fb2a4 Mon Sep 17 00:00:00 2001
From: James Houlahan <james.houlahan@protonmail.com>
Date: Tue, 11 Aug 2020 10:57:08 +0200
Subject: [PATCH] fix: don't select multipart/alternative if length is 0

---
 pkg/message/parser.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkg/message/parser.go b/pkg/message/parser.go
index d6e35be1..de7e1792 100644
--- a/pkg/message/parser.go
+++ b/pkg/message/parser.go
@@ -250,6 +250,10 @@ func bestChoice(childParts []parser.Parts, preferredContentType string) parser.P
 }
 
 func allPartsHaveContentType(parts parser.Parts, contentType string) bool {
+	if len(parts) == 0 {
+		return false
+	}
+
 	for _, part := range parts {
 		t, _, err := part.Header.ContentType()
 		if err != nil {