From 903072b69472345500fb0db82860eb2ef0cfd864 Mon Sep 17 00:00:00 2001
From: M66B <M66B@users.noreply.github.com>
Date: Wed, 6 Aug 2025 21:02:56 +0200
Subject: [PATCH] Force base64 for EML files

---
 app/src/main/java/eu/faircode/email/MessageHelper.java | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/app/src/main/java/eu/faircode/email/MessageHelper.java b/app/src/main/java/eu/faircode/email/MessageHelper.java
index 105af38460..7ec9a55dc9 100644
--- a/app/src/main/java/eu/faircode/email/MessageHelper.java
+++ b/app/src/main/java/eu/faircode/email/MessageHelper.java
@@ -1475,6 +1475,8 @@ public class MessageHelper {
                         attachmentPart.setDisposition(attachment.disposition);
                     if (attachment.cid != null)
                         attachmentPart.setHeader("Content-ID", attachment.cid);
+                    if ("message/rfc822".equals(attachment.type))
+                        attachmentPart.setHeader("Content-Transfer-Encoding", "base64");
 
                     if (attachment.isInline())
                         relatedMultiPart.addBodyPart(attachmentPart);