Handle message part errors

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

@@ -740,13 +740,14 @@ public class MessageHelper {
         Part part;
     }
 
-    MessageParts getMessageParts() throws IOException, MessagingException {
+    MessageParts getMessageParts() throws IOException {
         MessageParts parts = new MessageParts();
         getMessageParts(imessage, parts, false); // Can throw ParseException
         return parts;
     }
 
-    private void getMessageParts(Part part, MessageParts parts, boolean pgp) throws MessagingException, IOException {
+    private void getMessageParts(Part part, MessageParts parts, boolean pgp) throws IOException {
+        try {
             if (part.isMimeType("multipart/*")) {
                 Multipart multipart = (Multipart) part.getContent();
                 for (int i = 0; i < multipart.getCount(); i++)
@@ -800,6 +801,10 @@ public class MessageHelper {
                     parts.attachments.add(apart);
                 }
             }
+        } catch (MessagingException ex) {
+            Log.w(ex);
+            parts.warnings.add(Helper.formatThrowable(ex));
+        }
     }
 
     private static String readStream(InputStream is, String charset) throws IOException {