From 44852e42f2395f2e3f3cfe4a65bd965c2a9f8a71 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lo=C3=AFc=20Haas?= <loic.haas@haikou.ch>
Date: Wed, 6 May 2020 10:48:44 +0200
Subject: [PATCH] Fix attachment line length

---
 lettre_email/src/lib.rs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lettre_email/src/lib.rs b/lettre_email/src/lib.rs
index 48630ba..e9a53c2 100644
--- a/lettre_email/src/lib.rs
+++ b/lettre_email/src/lib.rs
@@ -271,7 +271,13 @@ impl EmailBuilder {
         filename: &str,
         content_type: &Mime,
     ) -> Result<EmailBuilder, Error> {
-        let encoded_body = base64::encode(&body);
+        let encoded_body = base64::encode(&body)
+            .as_bytes()
+            .chunks(72)
+            // base64 encoding is guaranteed to return utf-8, so this won't panic
+            .map(|s| std::str::from_utf8(s).unwrap())
+            .collect::<Vec<_>>()
+            .join("\r\n");
         let content = PartBuilder::new()
             .body(encoded_body)
             .header((