try {
            ContextInfo ci = null;
			String email = null;
			boolean isValid = 	contactService.validateEmailAddressExternal(email	, ci);

		} catch (OperationFailedException e) {
			// COnnection issue na buite
			// throw vaadin exception
		} catch (DoesNotExistException e) {
			// Invald epos
			// throw vaadin exception
		} catch (InvalidParameterException | MissingParameterException | PermissionDeniedException ex ) {
        	//
			// throw vaadin exception
		}