POP3 is polled always

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

@@ -444,7 +444,7 @@ public class FragmentOptionsSynchronize extends FragmentBase implements SharedPr
             }
 
             private void bindTo(EntityAccount account) {
-                cbExempted.setEnabled(!account.ondemand);
+                cbExempted.setEnabled(!account.ondemand && account.protocol == EntityAccount.TYPE_IMAP);
                 cbExempted.setChecked(account.poll_exempted);
                 cbExempted.setText(account.name);
             }