Filter group addresses

app/src/main/java/eu/faircode/email/FragmentCompose.java

@@ -5583,6 +5583,12 @@ public class FragmentCompose extends FragmentBase {
                         // - receipt
                         // - participation
 
+                        ref.from = MessageHelper.removeGroups(ref.from);
+                        ref.reply = MessageHelper.removeGroups(ref.reply);
+                        ref.to = MessageHelper.removeGroups(ref.to);
+                        ref.cc = MessageHelper.removeGroups(ref.cc);
+                        ref.bcc = MessageHelper.removeGroups(ref.bcc);
+
                         // References
                         if ("reply".equals(action) || "reply_all".equals(action) ||
                                 "list".equals(action) ||

app/src/main/java/eu/faircode/email/MessageHelper.java

@@ -5487,6 +5487,21 @@ public class MessageHelper {
         return result.toArray(new InternetAddress[0]);
     }
 
+    static Address[] removeGroups(Address[] addresses) {
+        if (addresses == null)
+            return null;
+
+        List<Address> result = new ArrayList<>();
+
+        for (Address address : addresses) {
+            if (address instanceof InternetAddress && ((InternetAddress) address).isGroup())
+                continue;
+            result.add(address);
+        }
+
+        return result.toArray(new Address[0]);
+    }
+
     static void getStructure(Part part, SpannableStringBuilder ssb, int level, int textColorLink) {
         try {
             Enumeration<Header> headers;