From ef8eea1d4ea7e2f8c500061786172c71ef22fbc0 Mon Sep 17 00:00:00 2001
From: M66B <M66B@users.noreply.github.com>
Date: Sun, 9 Jan 2022 08:53:25 +0100
Subject: [PATCH] Strip IPV6: prefix from bracket addresses

---
 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 8251d564ad..a3f487f914 100644
--- a/app/src/main/java/eu/faircode/email/MessageHelper.java
+++ b/app/src/main/java/eu/faircode/email/MessageHelper.java
@@ -2215,6 +2215,8 @@ public class MessageHelper {
         int e = value.indexOf(']', s + 1);
         if (s >= 0 && e > 0) {
             String ip = value.substring(s + 1, e);
+            if (ip.toLowerCase(Locale.ROOT).startsWith("ipv6:"))
+                ip = ip.substring(5);
             if (ConnectionHelper.isNumericAddress(ip) &&
                     ConnectionHelper.isLocalAddress(ip))
                 return true;