global with sharing class EmailHandler implements Messaging.InboundEmailHandler {

    global Messaging.InboundEmailResult handleInboundEmail(Messaging.InboundEmail email, Messaging.InboundEnvelope envelope) {

MetadataService.EmailServicesFunction result = new MetadataService.EmailServicesFunction();
result.fullName = 'AppErrorInbox';
result.apexClass = 'MYNS__EmailHandler';
result.functionName = 'App Error Inbox';
result.isActive = true;
result.attachmentOption = 'None';
result.authenticationFailureAction = 'Discard';
result.authorizationFailureAction = 'Discard';
result.functionInactiveAction = 'Discard';
result.isAuthenticationRequired = false;
result.isErrorRoutingEnabled = false;
result.isTextAttachmentsAsBinary = false;
result.isTlsRequired = false;
result.overLimitAction = 'Discard';
result.emailServicesAddresses = new List<MetadataService.EmailServicesAddress> { emailAddress() };