declare type ICallbackMethod = (returnValue: boolean) => void;
export declare const EMAIL_REGEX: RegExp;
/**
 * isEmailValid is the main function of this module, it validates an email with
 * a simple regex
 *
 * @param  {String}    email  Email that should be validated
 * @param  {Function}  [cb]   Optional callback method
 *
 * @returns {Boolean}          Is the email valid?
 */
export declare const isEmailValid: (email: string, cb?: ICallbackMethod) => boolean;
export default isEmailValid;
/**
 * isEmail is an alias for isEmailValid
 *
 * @returns {Boolean}
 */
export declare const isEmail: (email: string, cb?: ICallbackMethod) => boolean;