Log POP3 message errors

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

@@ -2632,7 +2632,6 @@ class Core {
                             continue;
                         }
 
-                        try {
                         Long sent = helper.getSent();
                         Long received = helper.getReceivedHeader(helper.getResent());
                         if (received == null)
@@ -2784,9 +2783,36 @@ class Core {
                             }
 
                         EntityContact.received(context, account, folder, message);
+                    } catch (FolderClosedException ex) {
+                        throw ex;
                     } catch (Throwable ex) {
+                        Log.e(ex);
                         db.folder().setFolderError(folder.id, Log.formatThrowable(ex));
-                        }
+                        //if (!(ex instanceof MessagingException))
+                        throw ex;
+
+                        /*
+                            javax.mail.MessagingException: error loading POP3 headers;
+                              nested exception is:
+                                java.io.IOException: Unexpected response: ...
+                                at com.sun.mail.pop3.POP3Message.loadHeaders(SourceFile:15)
+                                at com.sun.mail.pop3.POP3Message.getHeader(SourceFile:5)
+                                at eu.faircode.email.MessageHelper.getMessageID(SourceFile:2)
+                                at eu.faircode.email.Core.onSynchronizeMessages(SourceFile:78)
+                                at eu.faircode.email.Core.processOperations(SourceFile:89)
+                                at eu.faircode.email.ServiceSynchronize$19$1$2.run(SourceFile:51)
+                                at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:462)
+                                at java.util.concurrent.FutureTask.run(FutureTask.java:266)
+                                at eu.faircode.email.Helper$PriorityFuture.run(SourceFile:1)
+                                at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
+                                at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
+                                at java.lang.Thread.run(Thread.java:923)
+                            Caused by: java.io.IOException: Unexpected response: Bd04v8G0fQOraFZwxNDLapHDdRM0xj8oW+4nG4FVG05/WuE/sW8i3xxzx3unQBWtyhU3KDqQSDzz
+                                at com.sun.mail.pop3.Protocol.readResponse(SourceFile:12)
+                                at com.sun.mail.pop3.Protocol.multilineCommand(SourceFile:3)
+                                at com.sun.mail.pop3.Protocol.top(SourceFile:1)
+                                at com.sun.mail.pop3.POP3Message.loadHeaders(SourceFile:5)
+                         */
                     } finally {
                         ((POP3Message) imessage).invalidate(true);
                     }