IMAP send error on authentication failed

git-svn-id: http://svn.code.sf.net/p/davmail/code/trunk@2075 3d1905a2-6b24-0410-a738-b14d5a86fcbd

src/java/davmail/imap/ImapConnection.java

@@ -115,6 +115,10 @@ public class ImapConnection extends AbstractConnection {
                                 state = State.AUTHENTICATED;
                             } catch (Exception e) {
                                 DavGatewayTray.error(e);
+                                if (Settings.getBooleanProperty("davmail.enableKerberos")) {
+                                    // Kerberos authentication failed
+                                    throw e;
+                                }
                                 sendClient(commandId + " NO LOGIN failed");
                                 state = State.INITIAL;
                             }