Rocket.Chat.ReactNative/app/utils/isValidEmail.js

export default function isValidEmail(email) {
	/* eslint-disable no-useless-escape */
	const reg =
		/^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
	return reg.test(email);
}